What is the probability that Sue will select a green marble and then a white marble without replacing the first marble?
Given:
- 6 pink marbles
- 8 green marbles
- 5 orange marbles
- 9 white marbles
Calculate the probability.
Answer (2)
okay so she has 6+8+5+9 marbles. that is 28 the chance that she will first pick a green marble is the number of green marbles over the total number of marbles or 8/28 this is reduced to 2/7 If she does not replace the marble the next pick there will be 27 total marbles. the chance of a white marble is white marbles/all marbles or 9/27 reduced to 1/3 the probability of both is the first probability times the second probability
2/7 times 1/3 or 2/21
The probability that Sue selects a green marble and then a white marble without replacement is 21 2 . This is calculated by multiplying the probability of selecting the green marble first 7 2 by the probability of then selecting a white marble 3 1 .
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