Question

How many different 4-digit numbers can be
formed from the digits 2, 3, 4 and 6 if each
are formed
digit is used only once in a number ? Further
how many of these numbers end in a 3 or 6?
​

Answer 1

Answer:

total numbers can be formed by 2,3,4 and 6 are

4! = 4*3*2*1= 24

out of them numbers having 3 or 6 at the end are

12