Out of 7500 students, 75% are offered english and 45% are offered maths. How many are offered both?

Answer 1

not enough information for a solution

Answer 2

if x% do both, then
75+45-x = 100
x = 20%
0.20 * 7500 = 1500

Answer 3

oobleck's implicit assumption is that all students are offered
... english or math or both

25% are not offered english, and 55% are not offered math
... some students may not be offered either