Solveeit Logo
Login

Question

Question: The digits 1,2,3,....,9 are arranged in random order. The probability that 1,2,3 will appear as nei...

The digits 1,2,3,....,9 are arranged in random order. The

probability that 1,2,3 will appear as neighbours in order

mentioned is -

A

172\frac { 1 } { 72 }

B

136\frac { 1 } { 36 }

C

372\frac { 3 } { 72 }

D

118\frac { 1 } { 18 }

Answer

172\frac { 1 } { 72 }

Explanation

Solution

T.C. = ⌊9\lfloor 9 and F.C. = 172\frac { 1 } { 72 }