# Assembly time

The assembly time for the toy follows a normal distribution with a mean of 75 minutes and a standard deviation of 9 minutes. The company closes at 5 pm every day. If one starts assembling at 4 pm, what is the probability that he will finish before the company closes for the day?

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**Math Teacher**

We use an online normal distribution calculator for this:

https://www.hackmath.net/en/calculator/normal-distribution?mean=75&sd=9&above=&area=below&below=60&ll=&ul=&outsideLL=&outsideUL=&draw=Calculate

https://www.hackmath.net/en/calculator/normal-distribution?mean=75&sd=9&above=&area=below&below=60&ll=&ul=&outsideLL=&outsideUL=&draw=Calculate

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