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 {22}{392}

\frac {1}{396}

\frac {1}{396}

\frac {23}{56}

\frac {23}{56}

\frac {231}{561}

\frac {231}{561}

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Question 2

Time: 00:00:00
There were two candidates in an election. Winner candidate received 62% of votes and won the election by 288 votes. Find the number of votes cast to the winning candidate?

456

456

744

744

912

912

1200

1200

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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

7140/800000

8450/800000

8450/800000

7455/800000

7455/800000

8230/800000

8230/800000

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Question 4

Time: 00:00:00
A candidate who gets 30% of the marks fails by 50 marks. But another candidate who gets 45% marks gets 25 marks more than necessary for passing. Find the number of marks for passing?

150

150

200

200

250

250

275

275

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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

17/36

1/2

1/2

15/36

15/36

7/18

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

18/69

28/41

28/41

45/69

45/69

28/69

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

2/3

1

1

1/4

1/4

3/4

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

14/39

35/100

35/100

21/100

21/100

22/45

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

13/52

26/52

26/52

16/52

16/52

16/50

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

(A) 1/4

(A) 1/4

(B) 1/3

(B) 1/3

(C) 1/2

(C) 1/2

(D) 2/3 

(D) 2/3 

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