The numbers that have a 1 or 9 in the units digit are 1, 9, 11, 19, 21, 29, 31, 39, etc.
There are a total of 14 such numbers between 1 and 70.
The percentage is then (14/70)*100% = 20%
Riahu D.
asked • 05/14/17Quantitative Aptitude
What percentage of number from 1 to 70 have 1 or 9 in the unit's digit?
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