What is the probability that 3 customers waiting in a ban...
What is the probability that 3 customers waiting in a bank will be served in the sequence of their arrival at the bank
1/6
1/3
1/2
2/3
5/6
Correct answer is A
Probability that 3 customers are attended to in the sequence they arrive
= prob of attending to the 1st arrival x prob of attending to the second last x prob of attending to the last
= 13×12×11
= 16
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