SOLUTION: The mean of the numbers 1,3,X,Y,10,15 where X and Y are positive intergers is 7. Show that X+Y=13.

Algebra ->  Probability-and-statistics -> SOLUTION: The mean of the numbers 1,3,X,Y,10,15 where X and Y are positive intergers is 7. Show that X+Y=13.       Log On


   

Question 1020447: The mean of the numbers 1,3,X,Y,10,15 where X and Y are positive intergers is 7. Show that X+Y=13.
Answer by rothauserc(4718) About Me  (Show Source):
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The mean is the sum of the numbers divided by the number of numbers to sum
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we are given 6 numbers and their mean is 7, therefore
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the sum of our six numbers is 6 * 7 = 42
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the sum of four of our numbers is 1 + 3 + 10 + 15 = 29
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x + y = 42 - 29 = 13
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the sum of x + y is 13
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