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Of the 300 subjects who participated in an experiment using
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19 May 2020, 09:02
19 May 2020, 09:02
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49% (04:44) correct
50% (02:58) wrong based on 51 sessions
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Of the 300 subjects who participated in an experiment using virtual-reality therapy to reduce their fear of heights, 40 percent experienced sweaty palms, 30 percent experienced vomiting, and 75 percent experienced dizziness. If all of the subjects experienced at least one of these effects and 35 percent of the subjects experienced exactly two of these effects, how many of the subjects experienced only one of these effects?
A. 105
B. 125
C. 130
D. 180
E. 195
A. 105
B. 125
C. 130
D. 180
E. 195
Re: Of the 300 subjects who participated in an experiment using
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19 May 2020, 09:03
19 May 2020, 09:03
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Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Question From Our New Project: GRE Quant Challenge Questions Daily - NEW EDITION!
Re: Of the 300 subjects who participated in an experiment using
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19 May 2020, 22:06
19 May 2020, 22:06
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I didn't get why the answer is 180?
I solved it in that way: each group percentage convert to the member numbers, which is equals to:
Sweat p. - 120 members
Vomit - 90
Diz. - 225
both cases - 105
and used this formula: Total = Sweat. + Vomit. + Diz. - both effects - three effects, hence from there I obtained three effects number and it's equals to 30 members
300 = 120+90+225 - 105 - three cases
three cases = 30
now I just substract 105+30 from 300, and will get the number of people who experienced only one sympt 165 members, is my solution correct?
I solved it in that way: each group percentage convert to the member numbers, which is equals to:
Sweat p. - 120 members
Vomit - 90
Diz. - 225
both cases - 105
and used this formula: Total = Sweat. + Vomit. + Diz. - both effects - three effects, hence from there I obtained three effects number and it's equals to 30 members
300 = 120+90+225 - 105 - three cases
three cases = 30
now I just substract 105+30 from 300, and will get the number of people who experienced only one sympt 165 members, is my solution correct?
