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If 20 rabbits consume 48 pounds of rabbit food over the course of one
week, then the same number of rabbits would consume twice this amount
(48 + 48 = 96) over the course of two weeks. But we must also remember
that we have 5 fewer rabbits eating the food over the course of
two weeks. Five rabbits isn't a very significant decrease, especially
when we consider that the amount of time is being doubled. Therefore,
we can expect the food consumed to be more than the original amount (48
pounds) but not quite double the amount with all 20 rabbits (96 pounds).
Choice (A) is less than 48, so we can eliminate this choice. Choices
(D) and (E) are equal to or larger than 96, so we may also eliminate these
choices. Of the remaining choices, Choice (B) seems a little too close
to 48, considering that only 5 rabbits are being removed and the time
period is doubled.
So, by process of elimination, the most logical (and the correct) answer
is Choice (C), 72.
To solve
this problem without estimating, we would once again need to use a conventional
approach.
Now let's learn about the other Strategic Guessing approach — answer
choice elimination.
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