SOLUTION: melanie earned $450 in January, $320 is February, and $665 in March as a tutor. How much must she earn in April in order to average at least $500 per month for the four months from

Question 326919: melanie earned $450 in January, $320 is February, and $665 in March as a tutor. How much must she earn in April in order to average at least $500 per month for the four months from January through April?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

The average is the sum of the numbers divided by the number of numbers, hence the sum of the numbers must be the average times the number of numbers. Here you have a desired average of 500 and a number of numbers that is 3 but in the end will be 4. 4 times 500 is 2000. Add up what she has made so far in the first three months and subtract from 2000. The difference is what she needs to make in April.

John

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