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(a) In 2001, how many categories each comprised more than 25

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(a) In 2001, how many categories each comprised more than 25 [#permalink] New post 31 May 2019, 10:09
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(a) In 2001, how many categories each comprised more than 25 million workers?

(b) What is the ratio of the number of workers in the Agricultural category in 2001 to the projected number of such workers in 2015 ?

(c) From 2001 to 2015, there is a projected increase in the number of workers in which of the following categories?

I. Sales
II. Service
III. Clerical

[Reveal] Spoiler: OA
(a) Three (b) 9 to 14, or \(\frac{9}{14}\) (c) I, II, and III


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Re: (a) In 2001, how many categories each comprised more than 25 [#permalink] New post 06 Jun 2019, 00:50
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a) Here just find how many should have percentage greater than x, where x = (25*100)/150 = 16.66
which only three of them has, so ANS is (C)

b) (18*150)/(24*175) = 9/14

c) I, II, III (All three)
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Re: (a) In 2001, how many categories each comprised more than 25 [#permalink] New post 16 Jun 2019, 20:10
Is there a way to approach question in c) ?
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Re: (a) In 2001, how many categories each comprised more than 25 [#permalink] New post 17 Jun 2019, 11:01
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From 2001 to 2015, there is a projected increase in the number of workers in which of the following categories?

In the first pie the total number is 150 million and for simplicity we take in account 150.

Now we do have for sales the 7% of 150 = 12

In 2015 the total is 175 and the % of sales is 7 = 12.25 So we do have an increase of 0.25

The same process is valid for the other two categories.

All 3 had an increase.

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Re: (a) In 2001, how many categories each comprised more than 25 [#permalink] New post 18 Jun 2019, 13:54
thanks carcass
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