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Mathematics 9 Online
OpenStudy (anonymous):

The average (arithmetic mean) bowling score of n bowlers is 160. The average of these n scores together with a score of 170 is 161. What is the number of bowlers, n?

OpenStudy (welshfella):

total scores for n bowlers = 160n total scores + 170 = 160n + 170 average of these is (160n + 170) / (n+1)

OpenStudy (anonymous):

ok so this is what i have so far

OpenStudy (welshfella):

equate this to 161 and solve for n

OpenStudy (anonymous):

|dw:1436379175410:dw|

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