Question

'A' can complete a task in 24 days, while 'B' can finish the same task in 36 days. However, 'A' works at only 2/3 of his usual efficiency, and 'B' operates at 50% of his normal efficiency. Given these conditions, determine the number of days required for both of them, working together, to complete 75% of the task.

A 18 days
B 24 days
C 15 days
D 12 days
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