Question

A bag contains 10 marbles: 3 are green, 2 are red, and 5 are blue. Ashley chooses a marble at random, and without putting it back, chooses another one at -
random. What is the probability that the first marble is red and the second is blue? Write your answer as a fraction in simplest form.​

Answer 1

(1).probability of getting a red marble is.

total number of red marble is 2.

total number of marble is 10.

$p(e) = \frac{2}{10} = \frac{1}{5}$

(2). probability of getting a blue marble is

total number of blue marble is 3.

total number of marble in bag is 9

$p(e) = \frac{3}{9} = \frac{1}{3}$