Question

What percentage of the numbers from 1to 70 has 1or 9 in their unit as it digit​

Answer 1

20%

Explanation:

1,9,11,19,21,29,31,39,41,49,51,59,61,69 this is that series of numbers .These are total 14 numbers out of 70 so 14/70×100 gives us 20 % occurrence of 1 or 9 at unit place.