Ajar contains 30 red marbles, 50 blue marbles, and 20 white marbles. you pick one marble from the jar at random. find the theoretical probability.

First, find the sum of all the marbles that you have. That is 100 in total.

The probability of you getting a blue marble is 50/100, or 1/2, or 50%

A red marble is 30/100, or 3/10, or 30%

White 20/100, 1/5, 20%

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.