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1/r of a circular pizza has been eaten
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28 Jan 2019, 02:46
28 Jan 2019, 02:46
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\(\frac{1}{r}\) of a circular pizza has been eaten. If the rest of the pizza is divided into m equal slices, then each of these slices is what fraction of the whole pizza?
A) \(\frac{r}{rm}\)
b) \(\frac{(r-1)}{rm}\)
c) \(\frac{1}{m}\)
d) \(\frac{(m-1)}{rm}\)
e) \(\frac{(m-r)}{rm}\)
A) \(\frac{r}{rm}\)
b) \(\frac{(r-1)}{rm}\)
c) \(\frac{1}{m}\)
d) \(\frac{(m-1)}{rm}\)
e) \(\frac{(m-r)}{rm}\)
Re: Arithemtic- plugging in question
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28 Jan 2019, 04:00
28 Jan 2019, 04:00
1
Explanation::
It may be confusing just feed some nos.
Let size of pizza be 8 and r = 4
then pizza eaten = 8/4 = 2 and pizza left = 6
now m =2 and each side will be 3
Therefore the fraction would be : 3/8
Now feed the value of r , m in the above equation , only option B will be correct.
Moreover algebraically:
Pizza eaten = 1/r
Pizza left = 1-1/r
Now pizza divided =(1-1/r)/m
fraction of the whole pizza =\(\frac{(r-1)}{rm}\)
It may be confusing just feed some nos.
Let size of pizza be 8 and r = 4
then pizza eaten = 8/4 = 2 and pizza left = 6
now m =2 and each side will be 3
Therefore the fraction would be : 3/8
Now feed the value of r , m in the above equation , only option B will be correct.
Moreover algebraically:
Pizza eaten = 1/r
Pizza left = 1-1/r
Now pizza divided =(1-1/r)/m
fraction of the whole pizza =\(\frac{(r-1)}{rm}\)
gmatclubot
Re: Arithemtic- plugging in question [#permalink]
28 Jan 2019, 04:00
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