The average of a collection of 20 measurements was calculated to tb 56 cm. But l

Question

The average of a collection of 20 measurements was calculated to tb 56 cm. But later it was found that a mistake had occurred in one of the measurement which was recorded as 64 cm., but should have been 61 cm. The correct average must be -

Options:

A . 53 cm

B . 54.5 cm

C . 55.85 cm

D . 56.15 cm

Answer: Option C

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