Asked by indira
John scored a mean mark of 75 in 3 tests. If he scored 55 in another test, find his new mean.
Answers
Answered by
PsyDAG
mean = ∑x/n
75 = ∑x/3
∑x = 225
mean = (225+55)/4 = ?
75 = ∑x/3
∑x = 225
mean = (225+55)/4 = ?
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