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Mathematics
Arithmetic
Mean
John scored a mean mark of 75 in 3 tests. If he scored 55 in another test, find his new mean.
1 answer
[(3 * 75) + 55] / 4 = ?
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John scored a mean mark of 75 in 3 tests. If he scored 55 in another test, find his new mean.
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mean = ∑x/n 75 = ∑x/3 ∑x = 225 mean = (225+55)/4 = ?
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