CoCubes Probability Question and Answers Quiz-1

Question 1

Time: 00:00:00

A bag contains 3 red, 5yellow and 4 green balls.3 balls are drawn randomly, what is the probability that the ball drawn contains no yellow ball?

9/44

37/44

43/44

7/44

Question 2

Time: 00:00:00

There are 4 boys and 3 girls. they sit in a row randomly. What is the probability that all girls are together?

1/14

2/14

5/14

3/14

Question 3

Time: 00:00:00

A positive integer is selected at random and is divided by 7,what is the probability that the remainder is 1?

3/7

4/7

1/7

2/7

Question 4

Time: 00:00:00

3 individuals Sachin, Dhoni and Ashwin want to become the new coach of team india. The probablities of them becoming the new coach are 0.5, 0.3 and 0.2 respectively. If Sachin is appointed then probability of Virat appointed as a captain will be 0.7 and corresponding probablity if Dhoni or Ashwin is appointed are 0.6 and 0.5 respectively. Find the overall probability that Virat will appointed as a captain.

0.63

0.35

0.18

0.89

Question 5

Time: 00:00:00

If two fair dice are thrown simultaneously. then what is the probability that sum of the numbers appearing on the top faces of the dice is less than 4?

6/14

1/12

3/18

none

Question 6

Time: 00:00:00

A bag contains 4 white, 5 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red, is:

2/91

1/22

3/22

2/77

Question 7

Time: 00:00:00

A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random from this box. The probability that at least one of these is defective, is:

4/19

7/19

12/19

21/95

Question 8

Time: 00:00:00

In a class, 30% of the students offered English, 20% offered Hindi and 10% offered both. If a student is selected at random, what is the probability that he has offered English or Hindi ?

2/5

3/4

3/5

3/10

Question 9

Time: 00:00:00

A box contains 6 red balls, 7 green balls and 5 blue balls. Each ball is of a different size. The probability that the red ball being selected is the smallest red ball, is

1/18

1/3

1/6

2/3

Question 10

Time: 00:00:00

If A and B are 2 independent events and P(A)=0.5 and P(B) = 0.4, find P(A/B):

0.5

0.4

0.88

None of these