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Question: 5 persons A, B, C, D and E are in queue of a shop. The probability that 'E' is next to 'A', is...

5 persons A, B, C, D and E are in queue of a shop. The

probability that 'E' is next to 'A', is

A

1/5

B

1/7

C

1/8

D

None of these

Answer

1/5

Explanation

Solution

Total arrangement = 5!

Favourable arrangement = 4! × 1

P = 4!5!\frac { 4 ! } { 5 ! }= 15\frac { 1 } { 5 }