Change set
Pick exam & year, then Go.
Question map
Not attempted
Correct
Incorrect
★
Bookmarked
Loading…
Q16
(CISF/2017)
Miscellaneous & General Knowledge › Important Days, Places & Events
In a certain year, a school had 60% boys and 40% girls as students. In the next five years the number of boys decreased by 10% and the number of girls increased by 10%. What is the change in total roll strength of the school in the five years ?
Result
Your answer:
—
·
Correct:
B
Explanation
To calculate the change in total roll strength, we can assume the initial total number of students is 100.
- Initial State: Boys comprise 60% (60 students) and girls comprise 40% (40 students).
- Changes over five years:
- The number of boys decreased by 10%: 60 - (10% of 60) = 60 - 6 = 54.
- The number of girls increased by 10%: 40 + (10% of 40) = 40 + 4 = 44.
- New Total Strength: 54 (boys) + 44 (girls) = 98 students.
- Comparison: The total strength dropped from 100 to 98.
The net change is 100 - 98 = 2. As a percentage of the original 100, this represents a 2% decrease.
How others answered
Each bar shows the % of students who chose that option.
Green bar = correct answer, blue outline = your choice.
Community Performance
Out of everyone who attempted this question.
50%
got it right
✓ Thank you! We'll review this.