D01-22

Question

Out of 100 people surveyed, 60 were women. If 10 were smoking women and 20 were smoking men, what percentage of men surveyed were non-smokers?

A. 10
B. 20
C. 30
D. 40
E. 50

Bunuel · Answer

Official Solution:

Out of 100 people surveyed, 60 were women. If 10 were smoking women and 20 were smoking men, what percentage of men surveyed were non-smokers?

A. 10
B. 20
C. 30
D. 40
E. 50

From the 100 people surveyed, 60 were women, leaving us with  100 - 60 = 40  men. It was further noted that 20 of these men were smokers, hence  40-20=20  men were non-smokers. This provides sufficient information to answer the question:  \frac{40 - 20}{40} *100= 50\%  of the men surveyed were non-smokers. It's worth mentioning that the question also contains some unnecessary data regarding the number of women who were smokers.

Answer: E

cemil1986 · Answer

pretty easy mate

mockingjay · Answer

it's always wise to carefully read what the question is asking for, if it had been my first time answering this question then i too would have have answered 20%

gmathopeful19 · Answer

oof, did not read clearly. Fell for the easy trap

Poojita · Answer

I think this is a  high-quality  question and I agree with explanation. high quality questions

kaladin123 · Answer

I think this is a  high-quality  question and I agree with the explanation.
I had a close shave with the easy trap.

Men  Women  Total  
  Non-Smokers   20   50  70  
  Smokers  20  10  30  
  Total   40   60  100

Non-Smoking men% out of men surveyed  =\frac{20}{40}=50 %

martinfzb · Answer

oops, I choose 20% too. 
20 smoking men divided by the total 100 people.

Bunuel · Answer

I have edited the question and the solution by adding more details to enhance its clarity. I hope it is now easier to understand.

nancyaanwu · Answer