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Of the new students in a college, 45% took algebra as an [#permalink]
18 Feb 2006, 15:22

Of the new students in a college, 45% took algebra as an elective. What percent of the new students have a PC?
1). Of the new students selected algebra, 35% have a PC
2). Of all the new students, 21% neither have a PC nor select algebra.

from 1 we just know how many algebra guys has PC ... we dont know any thing about rest of the students .. so insufficient

from 2 we know 79% of total student either study algebra or have PC ... but from the main statement we know that only 45% took algebra so atleast 34 % has PC but still 2 doesnot say how many algebra guys has PC ..

this we get from 1 so once we add 1 and 2 we get the no of students who has PC .

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