BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

PS: Virtual reality therapy

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Senior | Next Rank: 100 Posts
Posts: 95
Joined: Tue Sep 13, 2011 3:19 pm
Thanked: 3 times
GMAT Score:710

PS: Virtual reality therapy

by massi2884 » Tue Apr 10, 2012 11:00 am
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 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?

105
125
130
180
195

OA is D
Top
Source: — Problem Solving |
User avatar
Legendary Member
Posts: 588
Joined: Sun Oct 16, 2011 9:42 am
Location: New Delhi, India
Thanked: 130 times
Followed by:9 members
GMAT Score:720

by rijul007 » Tue Apr 10, 2012 11:54 am
massi2884 wrote: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 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?

105
125
130
180
195

OA is D
Image


a+d+g+f = 40
b+d+g+e = 30
c+e+f+g = 75

d+e+f = 35

a+b+c+2(d+e+f)+3g = 145
a+b+c+d+e+f+g = 100
100+35+2g = 45
g = 10/2 = 5

a+b+c+ 2(35) + 15 = 145
a+b+c = 145 - 85 = 60

60% of 300 = 180

Option D
Top
Post new topic Post Reply
• Page 1 of 1