There are 12 coins in the bag. For the first case, the probability that a penny is selected from the bag is 5/12 because there are 5 pennies in the bag. Also, the next one is 3/11. Multiplying the probabilities,
(5/12)(3/11) = 8/121
The correct answer would be
A) 80 because if we organize all the tests scores from smallest numbers to biggest, and cross out numbers from each side, and keep going till one is left, we see 80 is the last number in the middle. *below is a image of my work.
You can eliminate choice B because pulling two cards (from 52) does not accurately represent the deck since the sample size is too small.
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There are 26 red cards (13 diamonds and 13 hearts) out of 52 total cards.
So the probability is 26/52 = 1/2, which means that the empirical probability can be determined. So choice C is out.
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Another way is to pull out cards at random and make notes as to what color cards you are pulling. Then you can divide the count of red cards by the count of cards total. This is basically what choice A is describing.
So the answer is choice A</span>
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Answer:
Mean of A: 5.5
Mean of B: 3
Step-by-step explanation:
Mean of A: (4 + 5 * 3 + 6 * 3 + 7) / 8 = 5.5
Mean of B: (2 * 3 + 3 * 3 + 4 * 3) / 9 = 3
