Explanation:

Let you have a class of 100 students.65 of them like cartoons ,so 35 of them don’tAnd 70 like horror.even if every person whos don’t likes horror there are still at least 70-30=20 who likesboth. And 75 people like war movie . that leaves 25 who don’t but even if all of these 25 people likecartoon and horror,
there are still 35-25= 10
10 people who like all three