Posted by HM on Wednesday, November 9, 2011 at 4:22am.
The prob of answering a question right (R) is 1/5, and the prob of answering it wrong (W) is 4/5
So you want the specific order of
RRRRW which would be (1/5)^4 (4/5) = 4/3125
I dont think it requires for it to be times by (4/5)
it is just asking for possibility of it being correct 4 times the first times..
so the answer is 1/625
:)
thank you reiny
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