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

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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

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

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

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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)

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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)

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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)

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7. Discrete probability distribution depends on the properties of ___________

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

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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

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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)

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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

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