A normally distributed population has mean 1,200 and standard deviation 120. Find the probability that a single randomly selected element X of the population is between 1,100 and 1,300. Find the mean and standard deviation of X for samples of size 25. • Find the probability that the mean of a sample of size 25 drawn from this population is between 1,100 and 1,300.

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A: Solution-: Given: We find P(the class received a higher score than 78)=?

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A: *Answer:

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Q: A random variable that is normally distributed where mean = 60, standard deviation = 2 and x=55.…

A: