1.

A consignment of 15 record players contains 4 defective. The record players are selected at random one by one and examined. The ones examined are not placed back. What is the probability that the 9^(th) one examined is the last defective.

Answer»


ANSWER :`(.^(11)C_(5) XX .^(4) C_(3))/(.^(15) C_(8)) xx (1)/(7)`


Discussion

No Comment Found

Related InterviewSolutions