SOLUTION: A batsman in his 17th inning makes 85 scores and thereby increases his average by 3. His average after 17th inning is?

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Question 504473: A batsman in his 17th inning makes 85 scores and thereby increases his average by 3. His average after 17th inning is?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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A batsman in his 17th inning makes 85 scores and thereby increases his average by 3.
His average after 17th inning is?
:
let a = his average after the 17th inning
then
(a-3) = his average before the 17th
:
a = %28%2816%28a-3%29%2B85%29%29%2F17
multiply both sides by 17
17a = 16(a-3) + 85
17a = 16a - 48 + 85
17a - 16a = 37
a = 37 his average after 17 innings