ProbabilityHard
Question
If from each of the three boxes containing 3 white and 1 black, 2 which and 2 black, 1 which and 3 black balls, one ball is drawn at random, then the probability that 2 white and 1 black balls will be drawn, is
Options
A.
B.
C.
D.
Solution
P(2 white and 1 black) = P(W1W2B3 or P(W1B2W3 or P(B1W2W3)
= P(W1W2B3) + P(W1B2W3) + P(B1W2W3)
P(W1)P(W2)P(B3) + P(W1)P(B2)P(W3) + P(B1)P(W2)P(W3)
(9 + 3 + 1)
= P(W1W2B3) + P(W1B2W3) + P(B1W2W3)
P(W1)P(W2)P(B3) + P(W1)P(B2)P(W3) + P(B1)P(W2)P(W3)
(9 + 3 + 1)Create a free account to view solution
View Solution FreeMore Probability Questions
Two aeroplanes I and II bomb a target in succession. The probabilities of I and II scoring a hit correctly are 0.3 and 0...If P(A) = 0.25, P(B) = 0.50 and P (AB) = 0.14, then the probability that neither A nor B occurs is-...An unbiased coin is tossed n times. Let X denote the number of times head occurs. If P(X = 4), P (X = 5) and P(X = 6) ar...A fair coin is tossed a fixed number of times. If the probability of getting 7 heads is equal to that of getting 9 heads...In a certain town, 40% of the people have brown hair, 25% have brown eyes and 15% have both brown hair and brown eyes. I...