it is known that there is a defective chip on a computer board that contains 5 chips. a technician tests the chips one at a time until the defective chip is found. the chips are randomly selected for testing without replacement.

Question

perl · Answer

what is the question (note a question has a question mark)

anonymous · Answer

Find the PMF and CDF of X and draw its graphs.

anonymous · Answer

number of chips tested before defective one is found..?

perl · Answer

so there are 5 cases

perl · Answer

Let X = # of chips tested before a defective chip is found
X can equal 1,2,3,4,5

perl · Answer

the sample space is basically  S, FS, FFS, FFFS, FFFFS

perl · Answer

S stands for finding defective chip

perl · Answer

|dw:1394176265053:dw|