Asked by vincent
30. The probability that Rob wins is 2/7 the probability that Rob loses,what is the probability that Rob loses?
A.2/7
B.5/7
C.9/7
D.7/9
E.2/9
Choice B is wrong.
A.2/7
B.5/7
C.9/7
D.7/9
E.2/9
Choice B is wrong.
Answers
Answered by
Steve
If P(win) = p, P(lose) = 1-p
p = 2/7 (1-p)
so, p=2/9, 1-p = 7/9
p = 2/7 (1-p)
so, p=2/9, 1-p = 7/9
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