Suppose that 55% of all adults regularly consume coffee,
45% regularly consume carbonated soda, and 70% regularly
consume at least one of these two products.
a) What is the probability that a randomly selected adult
regularly consumes both coffee and soda?
b. What is the probability that a randomly selected adult
doesn’t regularly consume at least one of these two
products?

Question

Suppose that 55% of all adults regularly consume coffee,
45% regularly consume carbonated soda, and 70% regularly
consume at least one of these two products.
a) What is the probability that a randomly selected adult
regularly consumes both coffee and soda?
b. What is the probability that a randomly selected adult
doesn’t regularly consume at least one of these two
products?

eujc21 · Answer

a) P(A N B) = P(A) + P(B) - P(AUB) = .3

eujc21 · Answer

for b. I'm stuck so far P(AUB)' but isnt that just 1-.7 ????

dumbcow · Answer

hey you got it....part b) is just 0.3 as well

eujc21 · Answer

I'll post one more that I was stuck on for a while

dumbcow · Answer

Ven diagrams can help with these type of problems

eujc21 · Answer

How would I go about this one  $$P(A_1' & A_2' U A_3)$$