Question

For problems 1-3: Johnny Awesome has three red marbles, two blue marbles 5 green marbles, and 7 yellowmarbles in a bag. What is the probability that'Johnny.....1) draws a red marble?a2) draws a yellow marble, replaces it, and then draws a blue marble?3) draws a blue marble, does not replace it, and then draws a green marble?

Answer 1

Given the following question:

3r

2b

5g

7y

3 + 2 + 5 + 7 = 17

`\begin{gathered} (3)/(17)=17.6percent \\ or\text{ }0.176 \end{gathered}`

3 representing the number of red marbles

17 representing the total number of marbles we can pick. We can convert the fraction into a percent or a decimal as needed hence 17.6%, and 0.176.

We have a 17.6% chance of picking a red marble.