total scores for n bowlers = 160n total scores + 170 = 160n + 170 average of these is (160n + 170) / (n+1)
ok so this is what i have so far
equate this to 161 and solve for n
no - there is no need to introduce another variable x check out my post
why? we dont know how much the other bowlers had though...
we 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
* that is 160* n
so 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
ouuuuuuuuuu i got it now
cross multiply 160n + 700 = 161n + 161 can you solve for n?