Question

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

Answer 1

Hey MATE!

% of numbers with unit digit as 1 or 9 =

(total no. of digits with unit digit 1 or 9 )*100
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total number of digits

$\frac{20}{70} \times 100 \\ \\ = > 20\%$

Hops it helps

Hakuna Matata :))