Answer:
a)
Step-by-step explanation:
Hope this helps :)
4 friends evenly dividing up a n - slice pizza
So each one get
slices of pizza.
For example, if n = 12 slice then each friend gets 12/4 = 3 pieces. If Harris ate one slice less then he ate
=3 -1 = 2 pieces.
So the general expression for slices of pizza did Harris eat is

Seeing where the x and y diffreant on the line :)
The key word here is "or". If it's an OR question, you add the probabilities together. If it says "and", you multiply them together
As it is an OR question though, you add them.
So:
15 + 5 = 20%
It should be 8/5 cause 4/5 times 24/12= 4/5 times 2/1. then u multiply.