The students in three classes are in the ratio 8 9 11 If 15 students are increased in each class the...........

Quantitative Aptitude ( CCS) Ratio, Proportion

The students in three classes are in the ratio 8 : 9 : 11. If 15 students are increased in each class, the ratio changes to 11 : 12 : 14. Then the total number of students in the three classes before the increase is:

105

120

140

155

छोटे Courses बड़े Results

Master Ratio, Proportion

Prepare through Micro-courses

Try Now

Explanation:

Let the original number of students be 8x, 9x and 11x
(8x + 15)/(9x + 15)=11/12
12(8x+15) =11(9x+15)
96x+180=99x+165
3x=15
x = 5
Required number of students = 8x + 9x + 11x

= 28x = 28*5 = 140

Hence, option 3 is the correct answer.