Question 550054
numbers with 1 in units digit are
1,11,21,31,41,51,61
number with 9 in units digit are
9,19,29,39,49,59,69,
This is {{{ 7 + 7 = 14 }}}
{{{ 14/70 = .2 }}}
20% of numbers from 1 to 70 have
1 or 9 in units digit