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# Discrete Mathematics Questions and Answers – Probability

This section focuses on "Probability" in Discrete Mathematics. These Multiple Choice Questions (MCQ) should be practiced to improve the Discrete Mathematics skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.

1. Probability theory was invented?

A. 1638
B. 1654
C. 1674
D. 1666

2. When we perform an experiment, then the set S of all possible outcomes is called the?

A. Random Experiment
B. Event
C. Sample Space
D. Tossing Space

3. If a coin is tossed, how many possible outcomes?

A. 1
B. 2
C. 3
D. 4

4. When a dice is thrown, What is the probability of any one of the numbers?

A. (1/3)
B. (5/6)
C. (2/3)
D. (1/6)

5. From a deck of 52 cards, if one card is picked find the probability of an ace being drawn?

A. (1/26)
B. (1/13)
C. (3/52)
D. (1/52)

6. From a deck of 52 cards, if one card is picked find the probability of a diamond being drawn?

A. (1/4)
B. (3/26)
C. (1/6)
D. (1/13)

7. Discrete probability distribution depends on the properties of ___________

A. discrete variables
B. probability function
C. machine
D. data

8. A bag contains 5 red balls and some blue balls .If the probability of drawing a blue ball is double that of a red ball, then the number of blue balls in a bag is:

A. 5
B. 10
C. 15
D. 20

9. Cards marked with numbers 2 to 101 are placed in a box and mixed thoroughly. One card is drawn from this box randomly, then the probability that the number on card is a perfect square.

A. (1/5)
B. (1/25)
C. (1/20)
D. (1/10)

10. The annual salaries of workers in a large manufacturing factory are normally distributed with a mean of Rs. 48,000 and a standard deviation of Rs. 1500. Find the probability of workers who earn between Rs. 35,000 and Rs. 52,000.

A. 0.42
B. 0.421
C. 0.422
D. 0.423