Search results for class 12

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

asked Nov 25, 2021 in Education by JackTerrance (1.7m points)

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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 Nov 25, 2021 in Education by JackTerrance (1.7m points)

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Given two independent events A and B such that P (A) = 0.3, P (B) = 0.6. Find (i) P (A and B) (ii) P (A and not B)

asked Nov 25, 2021 in Education by JackTerrance (1.7m points)

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A box contains 8 red marbles 6 green marbles and 10 pink marbles. One marble in drawn at random from the box.

asked Nov 25, 2021 in Education by JackTerrance (1.7m points)

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Two card are drawn from a pack of playing cards, one after the other,

asked Nov 25, 2021 in Education by JackTerrance (1.7m 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 Nov 25, 2021 in Education by JackTerrance (1.7m points)

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

asked Nov 25, 2021 in Education by JackTerrance (1.7m 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 Nov 25, 2021 in Education by JackTerrance (1.7m points)

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

asked Nov 25, 2021 in Education by JackTerrance (1.7m points)

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

asked Nov 25, 2021 in Education by JackTerrance (1.7m points)

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