Jenna has a bag that contains 7 red marbles and 25 blue marbles. She selects a marble at random, and then, without replacing the
first one, selects another marble at random. What is the probability that Jenna selects a blue marble and then a red marble? Round your answer to the nearest percent.
Jenna has a bag that contains the following => 7 red marbles => 25 blue marbles. She selects a marble at random, and then, without replacing the first one, selects <span>another marble at random. => 7 + 25 = 32 marbles are there in all. For blue marble => 1/32 is the probability For red => 1/31 is the probability or 3%</span>
So if we have a total of 32 marbles in the bag and the first pull we want a blue we can say the total number of favorable outcomes is 25/32 then to pull a red marble is 7/31 because one marble had been removed.
25/32 x 7/31 = 0.176 So now we need to round to the nearest percent which would be 18% chance.
