Probability Questions & Answers

Practice the crucial Probability questions that are constantly repeated on examinations. Probability-related questions and answers carry a medium weightage in the examination and must be exercised on a routine basis.

Concepts

Formulas

Practice Questions

Q1 If two dice are thrown simultaneously, then find the probability that the sum of numbers appeared on the dice is 6 or 7?

5/6

7/36

5/36

11/36

Q2 Two dice are thrown together. What is the probability that the sum of the number is even ?

1/2

1/4

1/6

Q3 A bag contains 21 toys numbered 1 to 21. A toy is drawn and then another toy is drawn without replacement. Find the probability that both toys will show even numbers.

5/21

3/14

6/22

4/21

Q4 A fair coin is tossed repeatedly. If head appears on the first four tosses, then the probability of appearance of tail on the fifth toss is.

1/7

1/2

3/7

2/3

Q5 Four boys and three girls stand in queue for an interview. The probability that they stand in alternate positions is?

1/35

1/34

1/68

1/17

Q6 A card is drawn at random from a pack of 52 cards. What is the probability that it is neither a spade nor a jack?

9/13

4/13

2/13

6/13

Q7 Two brothers Ram and Ravi appeared for an exam. The probability of selection of Ram is 2/7 and that of Ravi is 1/5. Find the probability that both of them are selected.

2/35

2/3

7/35

5/7

Q8 A family has 3 babies. What is the probability that atleast one of the babies is girl baby ?

7/8

8/7

7/6

6/7

Q9 There are 5 green 7 red balls. Two balls are selected one by one without replacement. Find the probability that first is green and second is red.

35/136

35/132

35/142

35/149

Q10

Q10 Three dice are rolled together. What is the probability as getting at least one '4'?

91/216

91/209

91/219

91/222

1 2 3

Practice Probability Questions & Answers

The more questions a candidate answers, the better their understanding of the Probability concepts and their ability to answer quickly and accurately.

Importance: Medium

Difficulty level: 3 out of 5 (Normal)

Examination- SSC, Banking, GMAT, GRE, SAT, CAT, etc.

Parent section: Quantitative Aptitude

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