Recent questions tagged probability

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Q: Two numbers are selected at random (without replacement) from the first six positive integers.

Two numbers are selected at random (without replacement) from the first six positive integers. Let X denote the larger ... Find E(X). Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: Let X denote the sum of the numbers obtained when two fair dice are rolled. Find the variance and standard deviation of X.

Let X denote the sum of the numbers obtained when two fair dice are rolled. Find the variance and standard deviation of X. Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: A class has 15 students whose ages are 14, 17, 15, 14, 21, 17, 19, 20, 16, 18, 20, 17, 16, 19 and 20 years.

A class has 15 students whose ages are 14, 17, 15, 14, 21, 17, 19, 20, 16, 18, 20, 17, 16, ... , variance and standard deviation of X. Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: In a meeting, 70% of the members favour and 30% oppose a certain proposal.

In a meeting, 70% of the members favour and 30% oppose a certain proposal. A member is selected at random and we take ... and Var (X). Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: The mean of the numbers obtained on throwing a die having written 1 on three faces, 2 on two faces and 5 on one face is

The mean of the numbers obtained on throwing a die having written 1 on three faces, 2 on two faces and 5 on one face ... (C) 5 (D) 1 Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: Suppose that two cards are drawn at random from a deck of cards.

Suppose that two cards are drawn at random from a deck of cards. Let X be the number of aces obtained. Then the value ... 1 13 (D) 2 13 Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: A die is thrown 6 times. If ‘getting an odd number’ is a success, what is the probability of

A die is thrown 6 times. If getting an odd number' is a success, what is the probability of (i) 5 successes ... ) at most 5 successes? Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: There are 5% defective items in a large bulk of items. What is the probability that

There are 5% defective items in a large bulk of items. What is the probability that a sample of 10 items will ... one defective item ? Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: A pair of dice is thrown 4 times. If getting a doublet is considered a success, find the probability,

A pair of dice is thrown 4 times. If getting a doublet is considered a success, find the probability, of two successes. Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance

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Q: Five cards are drawn successively with replacement from a well shuffled deck

Five cards are drawn successively with replacement from a well shuffled deck of 52 cards. What is the probability ... none is spade? Select the correct answer from above options...

asked Nov 25, 2021 in Education by JackTerrance