Question

Suppose that a batch of 100 items contains 6 that are defective and 94 that are not defective. Find p(x>2) for each of the following experiments.
(a) A sampling with replacement is done until a defective item is obtained and X is the number of trials needed.
(c) A sampling with replacement is performed until the third defective item is obtained and Xis the number of trials needed.

Answer 1

did'nt understnd

Answer 2

dont worry i misunderstood

Answer 3

for the first one its easier to work out p(X=<2)

and subtract this from 1

each trial we have p = 6/100 = 0.06