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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 cards—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.

Choose the correct option: A three digit number is formed by the digits 1, 2 and 3 with no digit being repeated. The probability that it will be an even number is _____.

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

5.

Choose the correct option: Ramesh has 5 yellow, 4 green and 7 blue balls in a bag. The probability that the randomly selected ball is green is ______.

1. 7/16
2. 9/16
3. 1/4
4. 3/4

6.

What is the probability that a number selected from numbers (1,2,3,…………,15) is a multiple of 5?

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

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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