Solve.A baker can decorate the day's cookie supply four times as fast as his new assistant. If they decorate all the cookies working together in 24 minutes, how long would it take for each of them to decorate the cookies working individually?

A. baker: 120 min
assistant: 480 min
B. baker: 120 min
assistant: 30 min
C. baker: 7 min
assistant: 29 min
D. baker: 30 min
assistant: 120 min


Answer: D

Mathematics

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Find, if possible, the number of elements in sets A, B, and C using the given information.n(A - C) = 10n(C - A) = 3n(A ? B) = 8n(C ? A) = 8n(C ? B) = 6n(B - A) = 8n(A ? B ? C) = 4

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A.
B.
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D.

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Mathematics