Question

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A building has two lifts. I, and L., are events when lifts are working. Probability P(L) 0.01
P(L.,). I, and L., are independent events. What is the probability of atleast one lift is not working ?
1 0.9999
B 0.09
IC) 0.0009
(D) 0.9989​

Answer 1

Answer:

The number of ways to assing 7 floors to 5 passengers is 7⋅7⋅7⋅7⋅7 beacuse for each passenger you can choose one of the 7 floors.

The number of ways to assign 7 floors to 5 passengers without repetition of floors is 7⋅6⋅5⋅4⋅3 because for the first passenger you have 7 option, for the second you will have 6 and so on. Note that this number count all possible orders betwen passengers too.

Then, you will guess it, the result is

7⋅6⋅5⋅4⋅375.

hope it helps you

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Answer 2

Answer:

ok this is your answer okok