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A die is rolled 180 times. You want to use normal approximation to find the probability that the number of 4 was rolled at least

A die is rolled 180 times. You want to use normal approximation to find the probability that the number of 4 was rolled at least 100 times.

1) What is the mean of the normal distribution that you would use in this case.

2) What is the standard deviation of the normal distribution that you would use in this case.

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