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anonymous
 one year ago
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?
anonymous
 one year ago
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?

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welshfella
 one year ago
Best ResponseYou've already chosen the best response.2total scores for n bowlers = 160n total scores + 170 = 160n + 170 average of these is (160n + 170) / (n+1)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok so this is what i have so far

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2equate this to 161 and solve for n

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0dw:1436379175410:dw

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2no  there is no need to introduce another variable x check out my post

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0why? we dont know how much the other bowlers had though...

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2we know that there are n bowlers and the average of their scores is 160 so the total scores = 160 8 n. We don't know the individual scores of each bowler but we don't need to . Average = total / n , so total = n * average

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2so we have the equation 160n + 170  = 161 n + 1  we divide by n+1 because there is 1 more bowler with a score of 170

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ouuuuuuuuuu i got it now

welshfella
 one year ago
Best ResponseYou've already chosen the best response.2cross multiply 160n + 700 = 161n + 161 can you solve for n?
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