Question

What percentage of numbers from 1 to 80 have 2 or 3 in the unit's digit?​

Answer 1

Answer:

20%

Step-by-step explanation:

We first list all the values possible :

2, 3, 12, 13, 22, 23, 32, 33, 42, 43, 52, 53, 62, 63, 72, 73

We can see that here are 16 of these such numbers. Also, we know that there are 80-1+1 numbers in our set. 16 is one fifth of 80, so, the percentage is 20%

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