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The distribution of weights of United States pennies is approximately normal with a mean of 2.4...

The distribution of weights of United States pennies is approximately normal with a mean of 2.4 grams and a standard deviation of 0.02 grams.

(a) What is the probability that a randomly chosen penny weighs less than 2.4 grams?
(b) What is the probability that the mean weight of 10 pennies is less than 2.4 grams?
(c) Could you estimate the probabilities from (a) and (c) if the weights of pennies had a skewed distribution?
I could still estimate (a): yes/no I could still estimate (b) . yes/no

math   Statistics-And-Probability   
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