Question

how many time does 9 occur in two digit number​

Answer 1

Answer:

Based on this, we can deduce that out of 90 total two digit numbers (10–99), 1 is in 10 of them in the first spot (1/9 x 90) and 9 in the second (1/10 x 90). 1 therefore occurs 19 times in numbers 10–99, but only in 18 numbers, as it comes up twice in one number, 11.

Answer 2

Answer:

19

Step-by-step explanation:

in the given question,

how many time does 9 occur in two digit number​

the hilighted word is saying only two digit , so we calculate from 10 to 99

i.e, 19,29,39,49,59,69,79,89,99....

∴ 19 times - 9 is present in two digit numbers