If 20 percent of the students at a certain school went to a camping trip and took more than $100, and 75 percent of the students who went to the camping trip did not take more than $100, what percentage of the students at the school went to the camping trip?
(A) 95
(B) 90
(C) 85
(D) 80
(E) 75
I think it is D... 80%
ReplyDeletelet total students be = t
let the students going on trip = s
20% of t = 25 % of s (as, 75% didn't take more than $100)
simple calculation gives us,
s/t = 80%
Excellent problem. completely bowled me out. Answer is 80%
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