Let me know if per means multiple and of is to divide

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

If g^-1(x) is the inverse of g (x) which statement must be true