1 European euro = 1.3687 US dollars. While traveling to Europe, Phelan exchanged 250 US dollars for euros. He spent 150 euros on
1 answer:
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Answer: c)[50,60]
Step-by-step explanation:
The Empirical rule says that , About 68% of the population lies with the one standard deviation from the mean (For normally distribution).
We are given that , The heights of students in a class are normally distributed with mean 55 inches and standard deviation 5 inches.
Then by Empirical rule, about 68% of the heights of students lies between one standard deviation from mean.
i.e. about 68% of the heights of students lies between
i.e. about 68% of the heights of students lies between
Here,
i.e. The required interval that contains the middle 68% of the heights. = [50,60]
Hence, the correct answer is c) (50,60)
I hope this helps you
