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A stack of cards consists of six red and five blue cards.
Chapter , Problem 6(choose chapter or problem)
A stack of cards consists of six red and five blue cards. A second stack of cards consists of nine red cards. A stack is selected at random and three of its cards are drawn. If all of them are red, what is the probability that the first stack was selected?
Questions & Answers
QUESTION:
A stack of cards consists of six red and five blue cards. A second stack of cards consists of nine red cards. A stack is selected at random and three of its cards are drawn. If all of them are red, what is the probability that the first stack was selected?
ANSWER:Step 1 of 2
Let,
The event of selecting the first stack.
The event of selecting the second stack.
The event that all red cards are drawn.
A stack of cards consists of six red and five blue cards. A second stack of cards consists of nine red cards.
Since, there are two stacks,
Now,