Probability 1

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Question 1

A number p is chosen at random from the numbers [-3, 3]. What is the probability that value of p < 2

  • 3/7

  • 5/7

  • 4/7

  • 1/7

Question 2

A box contains 6 black, 5 brown and 2 yellow balls. If 2 balls are selected at random, what is the probability that both are black?

  • 4/23

  • 5/26

  • 7/26

  • 8/15

Question 3

4 dices are thrown simultaneously. What is the probability that all the dices show the same number.

  • 1/216

  • 1/36

  • 4/216

  • 4/36

Question 4

An urn contains 12 red and 18 white marbles. Two marbles are drawn without replacement one after another. What is the probability that first is red and second is white?

  • 16/145

  • 9/32

  • 36/145

  • 5/32

Question 5

What is the probability that a number selected from numbers [1,30] is prime number?

  • 1/3

  • 2/7

  • 5/9

  • 5/30

Question 6

A bag contains 21 balls numbered 1 to 21. two balls are drawn one after another without replacement. Find the probability that both balls are even numbered.

  • 3/14

  • 2/3

  • 6/9

  • 1/8

Question 7

A 5 digit number is formed by using digits 1, 2, 3, 4 and 5 with no two digits same. What is the probability that the formed number is divisible by 4?

  • 1/5

  • 4/5

  • 3/5

  • 1/4

Question 8

A box having 5 black and 3 brown flags. Another box having 4 black and 6 brown flags. If one flag is drawn from each box. Find the probability that both flags are of different color.

  • 21/40

  • 10/19

  • 3/8

  • 3/10

Question 9

Ram speaks truth in 3/4 of cases and Shyam in 4/5 of cases. In what percent of cases while narrating the same event are they likely to contradict each other?

  • 35%

  • 25%

  • 20%

  • 40%

Question 10

What is the probability of getting a sum of 9 from two throws of a dice?

  • 1/3

  • 1/6

  • 1/9

  • 1/12

There are 18 questions to complete.

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