6. Of a certain high school graduating class, 75 percent of the students continued their formal education, and 80 percent of those who continued their formal education went to four-year colleges. If 300 students in the class went to four-year colleges, how many students were in the graduating class?
(A) 500
(B) 375
(C) 240
(D) 225
(E) 180
Answer: A
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Solution:
ReplyDeleteLet the number of students in graduating class be x
Then number of students continued their formal education = 0.75x
And number of students went got four year course = 0.80 * .075x =0 .6x
i.e. 0.6x = 300
x = 500