I'm pretty sure that it's 760 people out of 975 do there homework before 10pm is because if u multiply 975 by 78% it gives u your answer... I think that's how u find the persentage of a number
Step-by-step explanation: there are two white marbles and you want to know the probability of you not getting white so just subtract the white from the rest and put the rest of the marbles over ten