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Mathematics, 26.03.2021 19:40 dannnaa

The mean amount of time to make the batter for a cake is 14 minutes with a standard deviation of 2.5 minutes. The mean amount of time to bake the cake is 35 minutes with
a standard deviation of 6.2 minutes. What is the mean time to make and bake a cake?
What is the standard deviation?

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