Asum of money was distributed equally in class of boys. had there be 10 boys more , each would have received a rupee less and had there been 15 fewer, each would have received 3 rupee more. find the sum of money and number of boys

When you answer this can you explain

Mariah is randomly choosing three books to read from the following: 5 mysteries, 7 biographies, and 8 science fiction novels. which of these statements are true? check all that apply. there are 20c3 possible ways to choose three books to read. there are 5c3 possible ways to choose three mysteries to read. there are 15c3 possible ways to choose three books that are not all mysteries. the probability that mariah will choose 3 mysteries can be expressed as . the probability that mariah will not choose all mysteries can be expressed as 1 −

At a book fair, joe bought 24 books at 3 for $5 and had $2 left. how much money did he have at first?