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alison6399 | 19:43 Sat 12th Jan 2008 | Quizzes & Puzzles
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On his 1st 25 trips to the baths a swimmer managed to swim an average of 4 lengths each time . After a further 50 visits to the Baths his average number of lengths per visit rose to 8.

What was the swimmer's average number of lengths for the last visit only.

Please show all workings. Thanx
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Do you mean average for the '50visits'.........answer i think is 10
25 x 4=100
25 +50(75) x 8=600
......500 lengths swam during the 50 visits

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