Asked by anonymous
There are 4 black marbles and 5 red marbles in a bag. If you reach in and randomly select 2 marbles, what is the probability that both are red? Explain your reasoning.
Answers
Answered by
PsyDAG
This is assuming no replacement.
First red marble = 5/9
Second red marble = 4/8
With replacement, the second red marble = 5/9
The probability of both/all events occurring is found by multiplying the individual events.
First red marble = 5/9
Second red marble = 4/8
With replacement, the second red marble = 5/9
The probability of both/all events occurring is found by multiplying the individual events.
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