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Aptitude Probability Concepts
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Aptitude Probability Concepts
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Probability distribution of a random variable is also known as
A. Probability
B. Probability Function
C. Distribution Function
D. Probability Distribution
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A discrete probability distribution may be represented by
A. A table
B. A graph
C. A mathematical Equation
D. All of these
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If C is non-random variable, the E(C) is
A. 0
B. 1
C. 2
D. C
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For a probability density function (pdf), the probability of a single point is
A. 0
B. 1
C. 2
D. Constant
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The mean of hypergeometric distribution is
A. nk/N
B. n-k/N
C. n+k/N
D. nn/N
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If in a binomial distribution n = 1 then E(X) is
A. q
B. p
C. 0
D. 1
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Binomial distribution is symmetrical when
A. p = q
B. p > q
C. p < q
D. np > npq
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A fair coin is tossed four times, the probability of getting four heads is
A. 1/4
B. 1/8
C. 1/8
D. 1/32
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In a binomial probability distribution it is impossible to find
A. P(X = 0)
B. P(X < 0)
C. P(X > 0)
D. P(0 ≤ X ≤ n)
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Hypergeometric distribution has parameters
A. 1
B. 2
C. 3
D. 4
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Successive trials in binomial distribution are
A. Dependent
B. Independent
C. Equally Likely
D. Mutually exclusive
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In binomial distribution n=6 and p=0.9, then the value of P(X=7) is
A. Zero
B. One
C. Less than zero
D. More than zero
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The probability of success changes from trial to trial in
A. Sampling distribution
B. Binomial distribution
C. Hypergeometric distribution
D. Geometric distribution
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A listing of the possibile outcomes of an experiment and their corresponding probability is called
A. Bayesian table
B. Random Variable
C. Contingency table
D. Probability distribution
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If you roll a pair of dice, what is the probability that (at least) one of the dice is a 4 or the sum of the dice is 7?
A. 15/36
B. 13/36
C. 4/36
D. None of these
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If a card is chosen from a standard deck of cards, what is the probability of getting a diamond (♦) or a club(♣)?
A. 26/52=1/2
B. 13/52
C. 20/52
D. 12/52
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Two dice are thrown simultaneously ,what is the probability of getting a total of 7?
A. 1/3
B. 1/6
C. 1/12
D. 1/24
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In random experiment, observations of random variable are classified as
A. composition
B. functions
C. events
D. trials
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In binomial probability distribution, dependents of standard deviations must includes
A. probability of q
B. probability of p
C. trials
D. all of above
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There is a pack of 52 cards and Rohan draws two cards together, what is the probability that one is spade and one is heart ?
A. 3/102
B. 13/102
C. 23/102
D. 33/102
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