Cognizant Probability Quiz-1

Question 1

Time: 00:00:00
If the probability that A will live 15 yr is 7/8 and that B will live 15 yr is 9/10, then what is the probability that both will live after 15 yr ?

1/20

1/20

63/80

63/80

1/5

1/5

None of these

None of these

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Question 2

Time: 00:00:00
A bag contains 8 red and 5 white balls. 2 balls are drawn at random. What is the probability that both are white ?

1/39

1/39

5/39

5/39

1/9

1/9

1

1

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Question 3

Time: 00:00:00
Three unbiased coins are tossed. What is the probability of getting at most 2 heads ?

1/4

1/4

3/8

3/8

7/8

7/8

1/2

1/2

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Question 4

Time: 00:00:00
A brother and sister appear for an interview against two vacant posts in an office. The probability of the brother's selection is 1/5th and that of the sister's selections is 1/3rd. What is the probability that one of them is selected?

1/5

1/5

2/5

2/5

1/3

1/3

2/3

2/3

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Question 5

Time: 00:00:00
Four whole number taken at random are multiplied together. The chance that the last digit of the product is 1, 3, 7, or 9 is ?

4/625

4/625

16/625

16/625

1/625

1/625

2/625

2/625

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Question 6

Time: 00:00:00
The probability that a card is drawn from a pack of 52 cards will form a pack of 52 cards will be diamond or king being in?

4/13

4/13

5/13

5/13

8/13

8/13

4/25

4/25

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Question 7

Time: 00:00:00
The probability of getting heads in both trials when a balanced coin is tossed twice will be?

1/4

1/4

1/2

1/2

1

1

3/4

3/4

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Question 8

Time: 00:00:00
From a basket that contains 3 apples, 2 bananas, and 6 pineapples, find out the probability that that the chosen fruit is an apple.

4/11

4/11

3/11

3/11

5/12

5/12

None of these

None of these

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Question 9

Time: 00:00:00
The probability of drawing a red card from a deck of playing cards is

2/18

2/18

1/13

1/13

1/4

1/4

1/2

1/2

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Question 10

Time: 00:00:00
When two dice are rolled, what is the probability that the sum of the numbers appeared on them is 11?

5/16

5/16

2/18

2/18

3/18

3/18

1/18

1/18

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