The probability of pulling a black ball out of a glass jar is 1/X. The probability of pulling a black ball out of a glass jar and breaking the jar is 1/Y. What is the probability of breaking the jar?
a) 1/(XY).
b) X/Y.
c) Y/X.
d) 1/(X+Y).
e) 1/(X-Y).
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Probability of Pulling & Breaking
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franciskyle
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franciskyle
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Sorry, I just figured it out just after I pressed submit.
Here is my solution:
[spoiler]A * 1/X = 1/Y
A = (1/Y) / (1/X)
A = X / Y[/spoiler]
Here is my solution:
[spoiler]A * 1/X = 1/Y
A = (1/Y) / (1/X)
A = X / Y[/spoiler]
k. Francis
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dumb.doofus
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question on conditional probability..
P(b/a) = P(b intersection a)/P(a)
= 1/y/1/x
= x/y
P(b/a) = P(b intersection a)/P(a)
= 1/y/1/x
= x/y
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