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tj00343
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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
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
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
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