Search results for class 12

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

asked 6 days ago in Education by JackTerrance (1.0m points)

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Two cards are drawn from a pack of 52 cards. What is the probability that both are face cards.

asked 6 days ago in Education by JackTerrance (1.0m points)

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A fair coin and an unbiased die are tossed.Let A be the event ‘head appears on the coin’

asked 6 days ago in Education by JackTerrance (1.0m points)

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A bag contains 8 red and 4 green marbles. Find the probability that a marble selected at random is red.

asked 6 days ago in Education by JackTerrance (1.0m points)

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Two dice are rolled simultaneously. Find the probability of getting a doublet of even numbers.

asked 6 days ago in Education by JackTerrance (1.0m points)

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Tickets are numbered from 1 to 18 are mixed up together and one ticket is drawn at random.

asked 6 days ago in Education by JackTerrance (1.0m points)

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A bag contains 8 red and 4 green balls. Find the probability (a) ball drawn is red when one ball is selected at random.

asked 6 days ago in Education by JackTerrance (1.0m points)

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A bag contains 6 red, 4 white and Z black balls. Z balls are drawn at random.

asked 6 days ago in Education by JackTerrance (1.0m points)

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Two groups are competing for the positions on the board of directors of a corporation.

asked Nov 22 in Education by JackTerrance (1.0m points)

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In a certain college, 4% of boys and 1% of girls are taller than 1.75 metres. Furthermore, 60% of the students are girls.

asked Nov 22 in Education by JackTerrance (1.0m points)

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