Assignment chapter 1 class - 9th

ASSIGNMENT                CHAPTER- 1       CLASS 9TH             ASSIGNMENT

class -9th part -3 topic - rationalise the denominator

Topic- Rationalize the denominator (most important topic )

See this video (prepared by RUBINA HANDA)

 

CLICK  ON THIS link to see the above video

https://www.youtube.com/watch?v=1wYM7tuMpSw&t=5s

Home work -   DO EXERCISE 1.5 

FOR HINTS AND SOLUTIONS OF EX. 1.5 CLICK ON THE LINK GIVEN BELOW 

https://www.youtube.com/watch?v=gTkhOr8fOuU 

EXERCISE 1.6 IS BASED UPON EXPONENTS AND RADICALS CHAPTER OF CLASS 8TH

READ THE LAW OF EXPONENTS AND DO EX. 1.6 YOUR SELF .

class 10th chapter - 2 topic - relationship between zeroes and its cefficient

Chapter -  2                Polynomial                 Class - 10th 

Introduction -  TOPIC- 1

 

Click on this link for the introduction of polynomial and topic- 1

EXERCISE 2.2 Q1 

https://www.youtube.com/watch?v=a1TUkXaER5o&t=217s

 

 

Introduction -  TOPIC-2

 

 

Click on this link for the introduction of polynomial and topic-2

  Exercise 2.2   Q - 2  

https://www.youtube.com/watch?v=ZlHQY0YC5Ak

Home work -    Do exercise 2.2 

for hints and solutions of exercise 2.2 click on the link given below 

https://www.youtube.com/watch?v=Pgk476YCr6Y&list=PLZihDlFUnEczizNIhE3KXycLYPfqel2_B&index=1

class 9th part -2 introduction of irrational number exercise 1.2 and exercise 1.3

 

 Topic- Introduction of Rational numbers and their Decimal Expansions (see the full page)

 Click on this link  for introduction

 (This video is prepared by RUBINA HANDA)

https://www.youtube.com/watch?v=qhzDT3k0PBc&t=13s

 https://www.youtube.com/watch?v=Su7nym45lJw&t=6s

for hints and solutions of ex 1.3 click on this link

https://www.youtube.com/watch?v=zQo9Xf-U7Fo

        TOPIC- IRRATIONAL NUMBER AND HOW TO LOCATE IRRATIONAL NUMBER ON NUMBER LINE

Irrational number 

Irrational Numbers

An Irrational Number is a real number that cannot be written as a simple fraction.

Irrational means not Rational

l et's look at what makes a number rational or irrational ...

Rational Numbers

A Rational Number can be written as a Ratio of two integers (ie a simple fraction).

Example: 1.5 is rational, because it can be written as the ratio 3/2

Example: 7 is rational, because it can be written as the ratio 7/1

Example 0.333... (3 repeating) is also rational, because it can be written as the ratio 1/3

Irrational Numbers

But some numbers cannot be written as a ratio of two integers ...

...they are called Irrational Numbers.

Example: π (Pi) is a famous irrational number.

π = 3.1415926535897932384626433832795... (and more)

We cannot write down a simple fraction that equals Pi.
The popular approximation of ²²/₇ = 3.1428571428571... is close but not accurate.

Another clue is that the decimal goes on forever without repeating.

Cannot Be Written as a Fraction

It is irrational because it cannot be written as a ratio (or fraction),
not because it is crazy!

So we can tell if it is Rational or Irrational by trying to write the number as a simple fraction.

Example: 9.5 can be written as a simple fraction like this:

9.5 = 19/2

So it is a rational number (and so is not irrational)

Here are some more examples:

Number		As a Fraction		Rational or Irrational?
1.75		7/4		Rational
.001		111000		Rational
√2 (square root of 2)		?		Irrational !

Square Root of 2

Let's look at the square root of 2 more closely.

When we draw a square of size "1", what is the distance across the diagonal?

The answer is the square root of 2, which is 1.4142135623730950...(etc)
But it is not a number like 3, or five-thirds, or anything like that ...

... in fact we cannot write the square root of 2 using a ratio of two numbers

... and so we know it is an irrational number

 

Click on this link for introduction of irrational number and how to locate irrational number on the number line

 https://www.youtube.com/watch?v=ebOXPy9nQnU&t=936s

Home work - Note down the introduction in your fair note book and do exercise 1.2 and exercise 1.3

for hints and solutions of ex 1.2 click on this link 

https://www.youtube.com/watch?v=UbomktX0v9c

Dear students please update yourself by checking your maths homework through this blogger on MONDAY and THURSDAY 

If you have any doubt please mention your class , name and section and send your doubt in the comment box

 

 

class 10th probability exercise 15.1 and 15.2 solution (home work for 1.04.2020)

Dear students as presentation of introduction of this chapter was already shared now solve the exercise and assignment in your note book
and if you have any doubt then you can post your doubt in  comment box  .

Click on this link to see the solutions of exercise 15.1 and 15.2 

 

https://www.youtube.com/watch?v=I6OMrX2U1eQ&list=PLZihDlFUnEcx9IcceSBTfx1rF0lvcWKoC



ASSIGNMENT  OF CH- 15

PROBABILITY

   1.    A die is thrown once. Find ( a) P( a number ≥ 3)     (b)  P ( a number < 7)

          (c) P(odd number)        (d) P(prime number)  (e) P( between 2 and 6)

  2. In a single throw of two dice what is the probability of getting

       (a) both odd numbers  (b) a total of 9 or 11     (c) same no. on both the dice( doublet)

       (d) the sum of nos. as whole no.   (e) the sum of nos. as prime nos.

       (f) prime as a whole    (g)  sum of nos. less than 9  (h) sum more than 9

       (i) number as a whole divisible by 2 and 3   (j) number as a whole divisible by 2 or 3

   3. One card is drawn from a well shuffled deck of 52 cards . Find the probability of

      Drawing:- (a) an ace                   (b) a jack                            (c) red face card

                        (d) black queen         (e) red card                         (f) 10 of black suit

                        (g) 7 of club              (h) a diamond face card      (i) non ace non face card

                        (j)  a heart                 (k)  non face card                (l)  a king or a queen

                        (m) neither king nor a queen                       (n) a card of spades or an ace

                        (o)  a face card          (p) neither a red face card nor queen

  4. The king , queen and jack of clubs are removed from a pack of 52 playing cards. The remaining         cards     are then well shuffled and one card is selected at random. Find the probability of getting

      (a) a heart     (b) a king   (c) a club  (d) the 10 of hearts

  5.   All the three face cards of spades are removed from a well shuffled pack of 52 cards

      A card is drawn at random from the remaining pack . find the probability of getting

      (a) a black face cards      (b) a queen      (c) a black card

  6.   Two unbiased coins are tossed. Find the probability of getting

     (a) exactly two head         (b) exactly one tail                      (c) at least two tails

     (d) at most two tails          (e) not less than one head( or at least one head)    (f) no tail

  7. Three coins are tossed simultaneously. Find the probability of getting

      (a) head and tail alternately     (b) at least two head               (c) at most one head

  8.  In a family, there are three children. Assuming that chances of a child being a male or

     a female are equal. Find the probability that (a) there is one girl in a family                   (b) there is no female child in the family (c) there is at least one male child in the family

9.  What is the probability of having 53 Tuesdays in a (a) non-leap year    (b) leap year?

10.  If the probability of winning the game is 5/11. What is the probability of losing?

11. Sativa and Hamid are friends . What is the probability that both will have

      (a) different birthday ?                   (b) the same birthday?

12. A box contains cards bearing numbers from 6 to 70. If one card is drawn at random

      from the box, Find the probability that it bears             (a) one digit numbers

      (b) no. divisible by 5                                                      (c) no. divisible by 3 and 5

      (d)  no. divisible by 3 or 5                                              (e) no. which is perfect square

13. A box contains 20 balls bearing numbers 1,2,3,4,…….20, A ball is drawn at random

      from the box. What is the probability that the no. on the ball is

      (a) an odd no.    (b) divisible by 2or 3   (c) prime no. (d) not divisible by 10?

14. A bag contains 5 white balls, 7 red balls, 4 black balls and 2 blue balls. One ball is

      Drawn at random from the bag. What is the probability that the ball drawn is

       (a) white or blue     (b) red or black        (c) not white         (d) neither white nor black

15. Two customers are visiting a particular shop in the same week( Monday to Saturday)

      Each is equally likely to visit the shop on any one day as on another. What is the

      probability that both will visit the shop on (i) the same day (ii) different days

      (iii) consecutive days

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class 9th chapter- number system part -1 intoduction with exercise 1. 1(home work for 30.03.2020)

Chapter 1-    Introduction of number system

VIDEO OF INTRODUCTION -------

FLOW CHART  

CLICK ON THIS LINK TO SEE THE SOLUTION OF EXERCISE 1.1 

https://www.youtube.com/watch?v=GFS14WkoHD0&feature=youtu.be

Sample paper class 1oth maths