Question

What percentage of numbers from 1 to 70 have 1 or 9 in the unit's digit?

विकल्प

• 1%

• 14%

• 20%

• 21%

Answer 1

20%
Explanation:
Such numbers from 1 to 70 are 1, 9, 11, 19, 21, 29, 31, 39, 41, 49, 51, 59, 61, 69.
Total such number = 14
∴ Required percentage = `(14/70xx100)`% = 20%