Question

What percentage of numbers 1 to 50 has 2 or a 7 in the unit digit

Answer 1

Answer:

Total numbers From 1 -50 = 50

Numbers having 2 or 7 in unit digit = 2 , 7 , 12 , 17 , 22 , 27 , 32 , 37 , 42 , 47 = 10

$percentage \: = \: \frac{10}{50} \times 100$

Percentage% = 20%