Tom goes to a combined undergrad and Ph.D. program. It takes 3 years to finish the BS and 5 years to finish the Ph.D. Tom finishes it in 3/4ths the time. How long does it take for him to finish? Think carefully first, then make a decision:
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The program normally takes 3 + 5 = 8 years. So he manages to finish in 8 * 3 / 4 = 6 years. So, the answer is 6.
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