Let n be the middle number of three consecutive integers. Write an expression for the sum of these integers.

sum of the integers = []

There are 20 children in the cast of a class play and 8 of the children are boys of the boys 4 have a speaking part in the play and of the girls 8 do not have a speaking part in the play if a child from the cast of the place chosen at random what is the probability that the child has a speaking part

Which one ? is the answer and how to find this answer

Define multiplicative inverse. give an example of a number and its multiplicative inverse.