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The sixth grade mathematics supplementary exercise explains the answer to the last question on page 72.
Efficiency ratio: 10: 15=2:3.

Total amount ratio: 1: 2

The proportion of people: 1/2:2/3=3:4.

So the number of people processing desks and square tables is

3+4=7

56x3/7=24 (person)

56x4/7=32 (people) Answer: There are 24 people working at their desks and 32 people working on square stools.