Z - 7 = 22.5 the mean of data is 20 Z equals to
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The value of Z,
Z - 7 = 22.5
Z = 22.5 + 7
=29.5
.:20Z = 20 × 29.5
=590
Z - 7 = 22.5
Z = 22.5 + 7
=29.5
.:20Z = 20 × 29.5
=590
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