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Earn +20 ptsQ: What is the expected number if you roll a die three times?
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If i roll a die 90 times how many times can i expect to roll a 6?
pr(six) = 1/6 → expected 6s in 90 rolls = 1/6 × 90 = 15
How many times would you expect to roll an even number on a 6-sided number cube labeled 1-6 if you rolled 40 times?
The expected value is 20 times.
What is the probability of rolling a number greater than three if you roll a die two times?
fifty percent
If you roll a die 30 times how many times should you expect to roll a number less than 3?
The expected number of rolls under 3 is the number of rolls times the probability of rolling less than 3. So: E(rolls less than 3 out of 30) = 30 * 1/3 = 30/3 = 10
If you roll a dice 100 times how many times would you roll a three?
100/6 = 16.6 times
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