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Missing Weight

Problem

The weights of ten boys are recorded in a stem and leaf diagram.

Weight (kg)
4
5
6
7

7
2  4  7  9
1  4  6  8
2
Key:5
2   means 52 kg

Although the mean of the data is correct, two of the entries had their digits reversed and 75 kg was accidentally written down as 57 kg. Given that the 47 kg is not really the minimum weight, how heavy is the lightest boy?

Problem ID: 66 (Feb 2002)     Difficulty: 2 Star

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