/sci/ - Science & Math

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Anonymous Wed Aug 17 06:31:06 2011 No.3579604 [Reply] [Original]

I bet you cannot solve this:

A doctor has prescribed a skin cream for 10 of his patients. Unknown to him the treatment was successful in exactly 8 of the 10 cases. He asks his secretary to contact any 5 of the 10 patients as a follow-up. Assuming that the selection is made randomly, use counting methods to find the probability that:
(a) exactly 3 of those contacted had a successful result with the cream;
(b) at least 4 of those contacted had a successful result.

>>	Anonymous Wed Aug 17 06:32:06 2011 No.3579610 File: 35 KB, 445x354, 1313119546088.jpg [View same] [iqdb] [saucenao] [google] bumping

>>	Anonymous Wed Aug 17 06:34:06 2011 No.3579617 fuck you OP. not doing your homework.

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