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Q4

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by bacali » Mon Dec 01, 2008 3:28 pm
Of the 32 students in a certain class, 15 are in a music club and 20 are in a dance club.If 10 of the students are not in either club, how many of the students are in only one of the two clubs?



A. 5 B. 9 C.10 D. 17 E. 25



OA: B
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Re: Q4

by muzali » Mon Dec 01, 2008 3:51 pm
bacali wrote:Of the 32 students in a certain class, 15 are in a music club and 20 are in a dance club.If 10 of the students are not in either club, how many of the students are in only one of the two clubs?



A. 5 B. 9 C.10 D. 17 E. 25

OA: B
#Total=T=32
#Music=M=15
#Dance=D=20
10 students are in neither clubs, so total students in Music or Dance = T-10 =32-10 =22
Students in M&D=15+20-22 =13
So, students in music alone=15-13 =2 and students in dance alone=20-13=7
So students in only one of the clubs (does not matter which one) = 2+7 =9 (B)
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