A can complete a work in 12 days, and B in 16 days. They work together for 3 days. How much work is left?
\(\frac{9}{16}\)
A’s one-day work = \(\frac{1}{12}\), B’s one-day work = \(\frac{1}{16}\).
Together in one day = \(\frac{1}{12}+\frac{1}{16}=\frac{4+3}{48}=\frac{7}{48}\).
Work done in 3 days = \(3\times\frac{7}{48}=\frac{21}{48}=\frac{7}{16}\).
Work left = \(1-\frac{7}{16}=\frac{9}{16}\).
Hence, \(\frac{9}{16}\) of the work is left.
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