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Find the difference between the average energy required for one rotation of the hand for all three toys and the average energy required for one rotation of the neck for all three toys, if the energy required for 23 rounds of neck rotation for C is 207 units and the energy required for 17 rounds of hand rotation for A is 136 units.

1. 0.25
2. 0.18
3. 0.72
4. 0.33

Correct answer: 0.33

Solution

This is a data-based average comparison question. First, find unit energy rates from the given totals: for C, neck rotation energy per round = 207/23 = 9; for A, hand rotation energy per round = 136/17 = 8. Using the complete table values for all three toys, the required difference comes out to 0.33.

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