Instructions
Read the following table and answer questions.
Question 156
The ratio of the total number of students scoring less than 60% marks to that of scoring exactly 60% marks is
Solution
The number of students scoring more than 60% marks in school A = $$\frac{55}{100}\times800=440$$
Thus, students scoring exactly 60% marks in school A = $$800-440-320=40$$
Similarly, for other schools :
Total number of students scoring less than 60% marks = 320+220+300+280+210 = 1330
Total number of students scoring exactly 60% marks = 40+20+35+15 = 110
$$\therefore$$ Required ratio = $$\frac{1330}{110}=133:11$$
=> Ans - (B)
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