Find the mean and standard deviation of ...

Find the mean and standard deviation of the probability distribution of the number obtained when a card is drawn at random from a set of 7 cards numbered 1 to 7.

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PRADEEP PUBLICATION-PROBABILITY-EXERCISE

Find the mean and standard deviation of the probability distribution o...
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A dice is rolled twice in succession. Find the probability of a number...
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There are two independent events E1 and E2 and P(E1)=0.30, P(E2)=0.60 ...
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There are two independent events E1 and E2 and P(E1)=0.30, P(E2)=0.60 ...
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There are two independent events E1 and E2 and P(E1)=0.30, P(E2)=0.60 ...
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There are two independent events E1 and E2 and P(E1)=0.30, P(E2)=0.60 ...
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Let E1 and E2 be two independent events such that P(E1)=rho1 and P(E2)...
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Let E1 and E2 be two independent events such that P(E1)=rho1 and P(E2)...
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Let E1 and E2 be two independent events such that P(E1)=rho1 and P(E2)...
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Let E1 and E2 be two independent events such that P(E1)=rho1 and P(E2)...
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A bag contains 5 red, 7 green and 4 white balls. Three balls are drawn...
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A bag contains 5 red, 7 green and 4 white balls. Three balls are drawn...
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A bag contains 5 white, 7 red and 8 black balls. If four balls are dra...
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If A and B are two independent events such that P(AuuB)=0.6 and P(A)=0...
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If A and B are two independent events such that P(AcupB)=0.5, P(B)=0.2...
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Two dice are thrown together and the total score is noted. The events ...
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Three events A, B and C have probabilities 2/5,1/3 and 1/2, respectiv...
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A coin is tossed successively three times. Determine the probability o...
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Three coins are tossed once. Find the probability of getting at least ...
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Three coins are tossed. Find the probability of : atmost two heads
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A coin and a dice are thrown. What is the probability of getting "a he...
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