gomez36495983
05.11.2021 •
Mathematics
The number of calories in a 1-ounce serving of a certain breakfast cereal is a random variable with mean 110 and standard deviation 10. The number of calories in a cup of whole milk is a random variable with mean 140 and standard deviation 12. For breakfast, you eat 1 ounce of the cereal with 1/2 cup of whole milk. Let T be the random variable that represents the total number of calories in this breakfast.
The standard deviation of mathrmT is:
a. 22
b. 16
c. 15.62.
d. 11.66
e. 4
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Ответ:
3*2=6. 5*4=20 and 6*20=120
now,
15*8=120
so the correct ans is 15*8