vinayreguri wrote:In a school of 1000 students, 60% are males and rest are females, out of male students, 30% have opted for maths. if 40% of the overall students have opted for maths, what is the ratio of males to females who have not opted for maths.
A. 7:2
B. 7:3
c. 3:2
d. 1:1
e. 9:14
OA : B
Since the problem asks for a ratio, we can plug in 100 for the total number of students.
Use a group grid to organize the information:
Here is the grid with the following known values entered:
60% are males.
Out of the male students, 30% have opted for maths.
40% of the overall students have opted for maths.
The numbers in the grid have to add up horizontally and vertically.
Fill in the missing numbers:
Males who didn't opt for math : Females who didn't opt for math = 42:18 = 7:3.
The correct answer is
B.
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