Asked by wan
average of 6 numbers is 19.A seventh number is added and the new average is 20.What is the seventh number?
Answers
Answered by
Steve
6*19 + x = 7*20
x = 26
or, you could notice that if the average is raised by 1, then 1 must be added to each of the other 6 numbers, so now you have 6+20=26 more.
x = 26
or, you could notice that if the average is raised by 1, then 1 must be added to each of the other 6 numbers, so now you have 6+20=26 more.
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