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Class 9 Worksheets

1.

11 defective bulbs are accidentally mixed with 121 good ones. One ball is taken out at random from

this lot. Find the probability that the ball taken out is a good one.

this lot. Find the probability that the ball taken out is a good one.

1. 1/12
2. 7/12
3. 11/12
4. 1/11

2.

A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears a perfect square number.

3.

Five cardsâ€”the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random. What is the probability that the card is the queen?

4.

A die is thrown twice. Find the probability that same number will come up either time.

1. 1/6
2. 1/36
3. 1/3
4. 1/12

5.

Two die are thrown simultaneously. Find the probability of getting two numbers whose product is even.

1. 1/6
2. 1/4
3. 1/3
4. 3/4

6.

A card is drawn at random from a well shuffled deck of playing cards. Find the probability of drawing a face card.

1. 2/13
2. 5/52
3. 3/13
4. 6/13

7.

Cards, marked with numbers 5 to 50, are placed in a box and mixed thoroughly. A card is drawn from the box out random. Find the probability that the number on the taken card is an even number less than 10.

1. 2/23
2. 1/23
3. 3/46
4. None of these

8.

What is the probability that two persons have the same birthday?

1. 1/365
2. 364/365
3. 2/365
4. None of these

9.

A card is drawn at random from a well-shuffled deck of playing cards. Find the probability that the card drawn is a red queen.

1. 1/13
2. 1/52
3. 2/13
4. 1/26

10.

If a coin is tossed 3 times. What is the probability of occurrence of three heads?

1. 3/8
2. 1/8
3. 1/4
4. 1/2

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