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
The correct answer is: A
Explanation
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
= \(\frac{1}{3} \times \frac{1}{2} \times \frac{1}{1}\)
= \(\frac{1}{6}\)