Question

8. How many two-digit numbers are there not having the digit 4?
(3) 80
(4) 18
(1) 90
(2) 72​

Answer 1

Answer:

1

How many two digit numbers are there not having the digit 4?

Madhulika Saxena

Answered December 27, 2017

Firstly we calculate the two digit numbers having 4,

So the 2 digit numbers having 4 in tens place=10…..(Starting from 40,41…49)

2 digit numbers having 4 in ones place=9…..(Starting from 14,24….94)

But as 44 is counted twice we have to reduce total by 1. So,

Total 2 digit numbers having at least one 4 are 18

Total 2 digit numbers are=90

Therefore TWO DIGIT NUMBERS NOT HAVING 4 IN THEM=90–18=72.

Hope this helps…..

Answer 2

here ur answer.

helpful for u