1)
a
(bi) - (a-bu-
9.
i)
if n(u)= 100, n(a) = 75, n(b) = 40, n(aub) = 80, find n(
n(a-b), n(b - a) and n(a u b).

Pranav and molly are selling pies for a school fundraiser. customers can buy blueberry pies and pumpkin pies. pranav sold 6 blueberry pies and 4 pumpkin pies for a total of $106. molly sold 6 blueberry pies and 3 pumpkin pies for a total of $90. find the cost of each of one blueberry pie and one pumpkin pie