I have the answer for this but I do want to learn how to sloveit so Could you ex

Question

I have the answer for this but I do want to learn how to sloveit so Could you explain step by step... thank you in advance....
The time at the counter for a customer to be served at a postoffice can be modeled as a random variable having mean 176 secondsand variance 256. the sample mean X will be obtained from the timesfor a random sample of 100 customers. what is the probability thatX will be between 175 and 178 seconds? I have the answer for this but I do want to learn how to sloveit so Could you explain step by step... thank you in advance....
The time at the counter for a customer to be served at a postoffice can be modeled as a random variable having mean 176 secondsand variance 256. the sample mean X will be obtained from the timesfor a random sample of 100 customers. what is the probability thatX will be between 175 and 178 seconds?

Explanation / Answer

Given =176, =256 = 16, n=100 The probability is P(175

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