The mean of a normally distributed dataset is 12, and the standard deviation is 2.
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Using the together rate, it is found that they would prepare the solution in 1.71 minutes working together.
<h3>What is the together rate?</h3>It is the sum of each separate rate.
In this problem, the rates are given by:
- Johanna's: 1/6.
- Elizabeth's: 1/6.
- Dan's: 1/4.
Hence the together rate is given by:
7x = 12
x = 12/7
x = 1.71.
They would prepare the solution in 1.71 minutes working together.
More can be learned about the together rate at brainly.com/question/25159431
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