1.

A building has two lifts. L_(1) and L_(2) are events when lifts are working. Probability P(L_(1) ) = 0.01 = P(L_(2))* L_(1) and L_(2) are independent events. What is the probability of atleast one lift is not working ?

Answer»

0.9999
0.09
0.0009
0.9989

Answer :A


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