Question

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A bag contains 2 blue marbles and 2 green marbles. What is the probability of drawing a blue marble followed by a green marble, without replacing the first marble before drawing the second marble?

1/3
1/4
1/6
2/5
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Laurie rolls a number cube and then chooses a card from a set of cards numbered 1 through 8. What is the probability that she will roll an odd number and choose an even-numbered card?

1/8
1/14
1/4
1/2
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Charles rolls a number cube and then chooses a card from a set of cards numbered 1 through 24. What is the probability that he will roll an even number and choose an odd-numbered card?
1/4
1/8
1/3
1/24

Answer 1

Answer: First one: 1/3 Second one: 1/4 Third One: 1/4

Explanation:

First one:

1/2 Blue marble 2/3 green marble

1/2 * 2/3 = 1/3

Second One:

1/2 odd number roll 1/2 even-numbered card

1/2 * 1/2 = 1/4

Third one:

1/2 even 1/2 odd

1/2 * 1/2 = 1/4