Solved Probability and Probability Distributions

Probability and Probability Distributions MCQs for Competitive Exams

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139 MCQs Page 13

Topic Notes: Probability and Probability Distributions

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Probability and Probability Distributions MCQs in Commerce are useful for candidates who need targeted practice for CSS, PMS, FPSC, PPSC, NTS, entry tests, and other competitive exams in Pakistan. This topic page is designed for quick revision, repeated practice, and exam-focused preparation.

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121

Which of the following statements regarding the definition and properties of probability is incorrect?

A value near 0 means that the event is not likely to occur/happens

It must have a value between 0 and 1

It is the collection of several experiments

It can be reported as a decimal or a fraction

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122

Given that 5 out of 100 men and 10 out of 250 women are color blind, and assuming an equal number of men and women in the population, what is the total probability of selecting a color-blind person?

0.45

0.5

0.05

0.045

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123

For which theoretical probability distribution is the quartile deviation approximately equal to two-thirds of the standard deviation?

Normal Distribution

Binomial Distribution

Poisson Distribution

Random Distribution

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124

What are the possible values for the kurtosis coefficient, denoted as β2?

Equal to 3

Less than 3

All of the above

Greater than 3

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125

If events A and B are dependent, how is the conditional probability of A given B, denoted as P(A|B), calculated?

P(AB) / P(A)

P(B/A) / P(AB)

P(AB) / P(B)

P(B) / P(A)

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126

According to the addition theorem, if two events A and B are mutually exclusive, how is the probability of either event occurring calculated?

P(A) + P(B)

P(A) × P(B)

None of these

P(A) - P(B)

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127

What is the formula for the standard deviation of a binomial distribution?

1 - p

σp

None of these

σ2p

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128

Given that event A is a subset of event B, what is the probability of the difference between B and A, denoted as P(B - A)?

P(a)/P(b)

P(a) + P(b)

P(b) - P(a)

P(a) × P(b)

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129

What proportion of the area under a normal distribution curve falls within the range of μ ± 3σ?

0.9545

0.9973

1.0000

0.6827

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130

The joint probability is:

Based on two mutually exclusive events

The likelihood of two events happening together

The likelihood of an event happening given that another event has already happened

Also called prior probability

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Probability and Probability Distributions MCQs for Competitive Exams

Probability and Probability Distributions MCQs for Competitive Exams

Topic Notes: Probability and Probability Distributions

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