Out of 60 students of a hostel , 30 like apple , 25 like orange and the ratio of student who like apple only and orange only is 5 :4. find the ratio of the student who like both to the students who like none of them.​

If a || b and b | y, then ? a) x || y. b) x | a. c) a | y. d) a || y.

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8