188k views
16 votes
Please help!!

A jar contains 30 red marbles, 50 blue marbles, and 20 white marbles. You choose one marble from the jar at random. What is the theoretical probability of choosing a red marble?

2 Answers

10 votes

Answer:

Your probability of choosing a red marble is 30%

Explanation:

You'll need to start by adding all the marble's which will give you 100.

30 + 50 + 20 = 100

Then add up the non-red marbles, which is 70.

50 + 20 = 70

30 red marbles are left.

Now, you'll have the fraction 30 over 100.

As a percentage that would be 30%

User Davidbates
by
4.7k points
8 votes

Answer:

you have a 1/5 chance of choosing a red marble.

Explanation:

User Jitendra Pawar
by
4.4k points