Question

Suppose that it snows in Greenland an average of once every 27 days, and when it does, glaciers have a 25% chance of growing. When it does not snow in Greenland, glaciers have only a 9% chance of growing. What is the probability that it is snowing in Greenland when glaciers are growing? (Round your answer to four decimal places.)

Answer 1

start by drawing the probability tree

Answer 2

starting with which part?

Answer 3

1/27

Answer 4

under snow would it be .25 and under no snow .09?

Answer 5

it is a tree, so u need to show both branches ok ?

Answer 6

next, work out all probabilities
(multiply across the branches)