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Harrington Health Food stocks 5 loaves of Neutro-Bread. The probability distribution for sales of Neutro-Bread is listed in following table. How many loaves will Harrington sell on average?
Number of Loaves Sold Probability
0 .05
1 .15
2 .20
3 .25
4 .20
5 .15
Find the range and the standard deviation of the times.
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