How many number of 3 digits can be formed with the digits 1,2,3,4,5 if repetition of digits is not allowed?
Choose the correct choice from the following answers.
A) 60 B) 120 C) 30 D) 240 E) 48
n = number of digits = 5   r = number of places to be filled up = 3   Required number = 5P3 = 5!/2! = 60   60nswer is 60
<result>A</result>
How many number of 3 digits can be formed with the digits 1,2,3,4,5 if repetition of digits is not allowed?