Infosys Probability Questions and Answers Quiz -1

Question 1

Time: 00:00:00

In a horse racing competition, there were 18 numbered 1 to 18. The organizers assigned a probability of winning the race to each horse based on horses health and training the probability that horse one would win is 1/7, that 2 would win is 1/8, and that 3 would win is 1/7.Assuming that tie is impossible. Find the chance that one of these three will win the race?

$\frac {22}{392}$

$\frac {1}{396}$

$\frac {23}{56}$

$\frac {231}{561}$

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Question 2

Time: 00:00:00

There are 19 red balls and one black ball. Ten balls are put in one jar and the remaining 10 are put in another jar. What is the possibility that the black is in the right jar.

1

1/2

2/3

1/4

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Question 3

Time: 00:00:00

There are 1000 junior and 800 senior students in a class. And there are 60 sibling pairs where each pair has 1 junior and 1 senior.1 student is chosen from senior and 1 from junior randomly. What is the probability that the two selected students are from a sibling pair?

7140/800000

8450/800000

7455/800000

8230/800000

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Question 4

Time: 00:00:00

A bag contains 5 red caps, 4 blue caps, 3 yellow caps and 2 green caps. If four caps are picked at random, what is the probability that 2 are red, 1 blue and 1 green?

80/1001

70/1001

60/1001

50/1001

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Question 5

Time: 00:00:00

Two dice are thrown simultaneously. What is the probability that the sum of the numbers shown on the two dices will be a prime number?

17/36

1/2

15/36

7/18

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Question 6

Time: 00:00:00

There are 4 baskets. The first basket has 3 apples and 4 oranges, the second one has 4 apples and 5 mangoes, the third one has 6 Mangoes and 2 bananas and the last one has 7 bananas and 2 apples. If a fruit is randomly chosen from any basket and it comes out to be an apple, then what is the probability that it was taken out from the second basket?

18/69

28/41

45/69

28/69

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Question 7

Time: 00:00:00

3 persons are standing at the middle of edges of a Triangle. All the 3 persons starts moving at same time with same speed in random direction What is the probability of meeting at least 2 persons?

2/3

1

1/4

3/4

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Question 8

Time: 00:00:00

There is a school were 60% are girls and 35% of the girls are poor. Students are selected at random, what is the probability of selecting a poor girl out of total strength?

14/39

35/100

21/100

22/45

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Question 9

Time: 00:00:00

What is the probability of drawn an ace or a space or both from a dew of cards.

13/52

26/52

16/52

16/50

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Question 10

Time: 00:00:00

You are given three coins: one has heads on both faces, the second has tails on both faces, and the third has a head on one face and a tail on the other. You choose a coin at random and toss it, and it comes up heads. The probability that the other face is tails is

1/4

1/3

1/2

2/3

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