SOLUTION: If a boy scored 375 in five test and his average mrk was 75 marks.
how many marks must he score in his next test to have a mean of 72
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how many marks must he score in his next test to have a mean of 72
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Question 935718: If a boy scored 375 in five test and his average mrk was 75 marks.
how many marks must he score in his next test to have a mean of 72 Answer by Theo(13342) (Show Source):
You can put this solution on YOUR website! 6 tests with an average of 72 per test would total 6 * 72 = 432.
he currently has a total of 375.
432 - 375 = 57
if he scores a 57 on the next test, his average will be 72.
375 + 57 = 432 / 6 = 72.
