Sign in
Please select an account to continue using cracku.in
↓ →
In a class, 60% and 68% of students passed their Physics and Mathematics examinations respectively. Then at least ___________percentage of students passed both their Physics and Mathematics examinations.
Correct Answer: 28
Let us assume that there are a total of 100 students. 60% of the students passed in physics, thus 60 students passed physics. 68% students passed in math, thus 68 students passed in math.
Let us assume that x students passed in both the Math and Physics exams, and let n students didn't pass in both exams.
=> n + (60-x) + x + (68-x) = 100
=> n + 128 - x = 100
=> x = 28 + n
The least value of n can be 0, and therefore, the least value of x will be 28.
Thus, at least 28% students passed in both the Math and Physics exams.
Create a FREE account and get: