Question

the probability of pulling a red marble out of a bag of colored marbles is 3:7. If you were to pull colored marbles out of the bag (one at a time, and putting marble back each time) for 500 tries, approximately how many times would you select a red marble?

Answer 1

Approximately you would select a marble 214 times.

Answer 2

We would approximately pick a red marble 214 times

Explanation:

the probability of pulling a red marble out of a bag of colored marbles is 3:7

i.e. if x is the number of trials then we would pick a red marble approximately

`(3)/(7)x` times

Here, we are given 500 trials

i.e. x=500

Then, number of times we would pick a red marble is:

`(3)/(7)* 500` times

≈ 214 times

Hence, we would approximately pick a red marble 214 times