12.How many multiples of 5 are there from 10 to 95?
A.20 B.18
C.15 D.25
Solution:
As you know, multiples of 5 are integers having 0 or 5 in the digit to the extreme right (i.e. the unit’s place).
The first digit from the right can be chosen in 2 ways.
The second digit can be any one of 1,2,3,4,5,6,7,8,9
i.e. There are 9 choices for the second digit.
Thus, there are 2*9= 18 multiples of 5 from 10 to 95.
Title : Permutation And Combination Q12
Description : 12.How many multiples of 5 are there from 10 to 95? A.20 B.18 C.15 D.25 Solution: As you know,...
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