2000
Mathematics
67ca00ce0c643c71d77dee1f
X and Y are two events. The probability of X or Y is 0.7 and that of X is 0.4. If X and Y are independent, find the probability of Y.
A.
0.30
B.
0.50
C.
0.57
D.
1.80
Correct Answer: 0.30
Explanation
P (X or Y) = P(X) + P(Y), when they are independent as given. 0.7 = 0.4 + P(Y) P(Y) = 0.7 - 0.4 = 0.30
P (X or Y) = P(X) + P(Y), when they are independent as given. 0.7 = 0.4 + P(Y) P(Y) = 0.7 - 0.4 = 0.30THIS WEEK's
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