Q. 15.0( 2 Votes )

A four digit numb

Answer :

Given, a four-digit number is formed with the digits 1, 2, 3, 5 with no repetitions. There are as many numbers as there are ways of filling in 4 vacant places.

The no. of ways in which the 4 places can be filled, by multiplication principle, is ways

For the Numbers divisible by 5,

the 4th place can be only filled by 1 way i.e., by 5, the 1st place can be filled by 3 ways (since repetition is not allowed), the second place by 2 ways and the third by 1 way.

total numbers divisible by

P (no. divisible by 5)

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

State True or FalMathematics - Exemplar

Fill in theMathematics - Exemplar

A speaks truth inMathematics - Board Papers

Often it is takenMathematics - Board Papers

Assume that each Mathematics - Board Papers

A bag X contains Mathematics - Board Papers