100 x 0.4 = 40. So 40 students listen to hip hop
Answer:
Option A
Step-by-step explanation:
We can try to factorize all the options one by one.
For A:

We can see that the quadratic expression cannot be solved by factorization as the factors at the end of factorization are not equal in both brackets. So Option A is the correct answer for the given question.
Moreover we can also note that all the other quadratic expressions can be factorized ..
65 bought 3 or more.
950x0.82=779
779-528=251
251-186=65
Final answer: 65