Question

If the probability of picking a red marble out of a bag is 0.4 and the probability of choosing a green marble out of the same bag is 0.25 what is the probability of randomly choosing a red or green marble out of the bag with one pick

Answer 1

So...
p of red=0.4
p of green=0.25

You are looking for the p of red or green 
when we have an "or" we add probability so....
.4+.25=0.65

Answer 2

0.65 because if you do the math p= and then w=