Question

A bag of marbles contains 14 red marbles, 6 yellow marbles, and 3 blue marbles. One marble isdrawn from the bag at random. What is the probability that the marble is red or blue?

Answer 1

You have the next set: Total of marbles in the bag:

`\begin{gathered} \lbrace r,r,r,r,r,r,r,r,r,r,r,r,r,r,y,y,y,y,y,y,b,b,b\rbrace \\ \\ \end{gathered}`

Where r is red marble, y is yellow marble and b is blue marble.

Yu have in total 23 marble in the bag.

T=23

The next set is the marble that are red or blue:

`\lbrace r,r,r,r,r,r,r,r,r,r,r,r,r,r,b,b,b\rbrace`

Then, 17 marble are red or blue.

Then, the probability of drawn from the bag a marble red or blue is: Approximate 0.74

`P=(17)/(23)\approx0.739`