- #1

tj00343

- 63

- 0

I'm completely lost on this probability problem,

A Box contains 5 indiscernible CDs.It is known that among them 2 are for children .So in order to find the first children's CD ,they are tested one after the other (successively ),Denote by X the random variable which represents the number of tests until the first children's cd is spotted

1- List all the possible values of X

2-Determine the probability distribution of X

3- Calculate the probability that at least 2 tests were performed

1- x={1 2 3 4 }

2- very lost here

3- I can't solve without part 2

thank you

## Homework Statement

A Box contains 5 indiscernible CDs.It is known that among them 2 are for children .So in order to find the first children's CD ,they are tested one after the other (successively ),Denote by X the random variable which represents the number of tests until the first children's cd is spotted

1- List all the possible values of X

2-Determine the probability distribution of X

3- Calculate the probability that at least 2 tests were performed

**2. The attempt at a solution**1- x={1 2 3 4 }

2- very lost here

3- I can't solve without part 2

thank you

Last edited: