Question

find p(not a 2)

x 1 2 3 4


P(x) 0.30 0.40 0.15 0.15

please help me! im on apex and cant fail this quiz again :(

Answer 1

the probabilities add up to 1
not a 2 means it is 1, 3, or 4
you could add the prob of each of those
or
do 1 - prob of being 2
you should get the same answer either way

Answer 2

so 0.6?

Answer 3

yes