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Find the average of all the numbers from 1 to 100, where the final digit is an odd prime number.

 Jun 17, 2020
 #1
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The average is the sum of numbers 1 to 100 divided by 100.

 

1+...+100=

=101*50

= 5050

 

5050/100=50.5

 Jun 18, 2020

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