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The lengths of 40 leaves of a plant are ...

The lengths of 40 leaves of a plant are measured correct to the nearest millimetre, and the data obtained is represented in the following table: Length (in mm): 118-126 127-135 136-144 145-153 154-162 163-171 172-180 No. of leaves: 3 5 9 12 5 4 2 Find the mean length of leaf.

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The correct Answer is:
146.75 mm
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