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At a dinner party, 40 percent of the guests wore both jacket
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Updated on: 19 Oct 2019, 12:13
Updated on: 19 Oct 2019, 12:13
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Question Stats:
65% (01:51) correct
34% (02:12) wrong based on 79 sessions
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At a dinner party, 40 percent of the guests wore both jackets and ties. If 50 percent of the guests who wore jackets did not wear ties, what percent of the guests wore jackets?
A. 20 percent
B. 40 percent
C. 60 percent
D. 70 percent
E. 80 percent
A. 20 percent
B. 40 percent
C. 60 percent
D. 70 percent
E. 80 percent
Re: At a dinner party, 40% of the guests wore both jackets and t
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06 Feb 2018, 20:08
06 Feb 2018, 20:08
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awamy wrote:
At a dinner party, 40% of the guests wore both jackets and ties.
if 50% of the guests who wore jackets didn't wear ties, what % of the guests were jackets?
A) 20%
B) 40%
C) 60%
D) 70%
E) 80%
if 50% of the guests who wore jackets didn't wear ties, what % of the guests were jackets?
A) 20%
B) 40%
C) 60%
D) 70%
E) 80%
Hello awamy,
I have seen you have posted 16 posts.
Can i request you to read the rules of posting before you post anything. This help to keep the greprep club segregated with the type of Question/Topic and also helps to search the particular topic. Also share the SOURCE of the topic
https://gre.myprepclub.com/forum/rules-for ... -1083.html.
Thanks and keep posting
Sherpa Prep Representative
Joined: 15 Jan 2018
Posts: 147
Given Kudos: 0
Re: At a dinner party, 40% of the guests wore both jackets and t
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06 Feb 2018, 23:26
06 Feb 2018, 23:26
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Expert Reply
This is an overlapping set. You can recognize these because it's possible to do two things at once, or neither, or just one; in this case it's wearing a jacket and/or a tie. Many people use Venn diagrams for these but Venn diagrams can be confusing. An Overlapping Set Table is much easier. Simply draw three vertical and three horizontal lines and then label them with the two possibilities and their opposites. Consult the attached image for an example. Then just fill in the parts of the table. The boxes in every row and column should add to the total.
In this problem, we aren't given any numbers; rather we're given percents. No biggie. Just pretend that the total number of people is 100 and then treat the percents we're given as though they're actually totals. This allows us to fill out the table as illustrated below. Therefore the answer is E.
In this problem, we aren't given any numbers; rather we're given percents. No biggie. Just pretend that the total number of people is 100 and then treat the percents we're given as though they're actually totals. This allows us to fill out the table as illustrated below. Therefore the answer is E.
Attachments
jackets and ties.jpg [ 22.3 KiB | Viewed 13195 times ]
