help needed on word problem_2

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help needed on word problem_2

by sohaib_iba » Thu Feb 25, 2010 9:25 am
In a certain college, the ratio of Mathematics majors to English majors is 3:8. If in the following school year the number of Mathematics majors increases 20% and the number of English majors decreases 15%, what is the new ratio of Mathematics majors to English majors.

A) 4:9
B) 1:2
C) 9:17
D) 17:32
E) 7:12

If someone could help me in solving this question then i will be very thankful.
Source: — Problem Solving |

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by djkvakin » Thu Feb 25, 2010 9:39 am
The answer is C. You can do a simple backsolving. The total parts 8+3 is 11. Pick a number of total students of 110. 30 students in math and 80 in english.
Next year 36 in math, 68 in english. 36/68=9/17

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by onedayi'll » Thu Feb 25, 2010 10:24 am
+ 1 C
9:17
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