In a test tube, you have 4ml of oil and 6 ml of water. what percentage of the liquid is oil?

You are constructing a histogram for scores that range from 70 to 100 in whole points. frequencies range from 3 to 10; that is, every whole-point score between 60 and 100 occurs at least 3 times, and at least one score occurs 10 times. which of these would probably be the best range and size for the score intervals along the x-axis?

Can someone me and do the problem plz so i can understand it more better

Icould really use some with this question.