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Let’s assume the total work = 1 unit (or 1 whole work).
So, Jason’s 1 day work = 1/20
Jason + Jamal’s 1 day work together = 1/9
Jamal’s 1 day work = (Jason + Jamal)'s 1 day work − Jason’s 1 day work = 1/9 - 1/20 = 11/180
Jamal alone can complete the work in 180/ 11 days, or approximately 16.36 days
Change the question mark with the option that follows the applied logic in the first pair.
114: 24 :: 394: ??
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