Question

(c) 15%
(d) 14%
25. In a class, 65% of the students are boys. On a
particular day 80% of girl students were present
What was the fraction of boys who were present
that day if the total number of students present
that day was 70%?
(a) 2/3
(b) 28/65
(c) 5/6
(d) 42/65​

Answer 1

SOLUTION:

From given statements:

Step 1. Assume 100 students in the class. So 65 boys and 35 girls.

Step 2. On a day 80% of these 35 girls present or 28 girls present.

Step 3. On that day 70 students present.

Deduced: 70 present; 28 girls. So boys = 42.

Question is: Fraction of boys present that day?

ANSWER: 42/70 = 6/10.

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