What percentage of numbers from 1 to 70 have 1 or 9 in the units digit? Options: A . &nbsp1 B . &nbsp14 C . &nbsp20 D . &nbsp21

What percentage of numbers from 1 to 70 have 1 or 9 in the units digit?

Question

What percentage of numbers from 1 to 70 have 1 or 9 in the units digit?

Options:

A . 1

B . 14

C . 20

D . 21

Answer: Option C

the digit 1. Such numbers from 1 to 70 are 1, 9, 11, 19, 21, 29, 31, 39, 41, 49, 51, 59, 61, 69.

Number of such number =14

So, Required percentage = \(\left(\frac{14}{70}\times100\right)\) % = 20%

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