You would do 40 x 0.1 it would be 4. Add that 4 to the 40 and your answer would be 44
Percentage of bags that weigh more than 9.25 ounces is 19.3%.
Given:
Mean μ = 9.12
standard deviation σ = 0.15
z = x - μ / σ
= 9.25 - 9.12 / 0.15
= 0.13/0.15
= 0.867
P(x>Z) = 0.193
= 0.193/100
= 19.3%
Therefore Percentage of bags that weigh more than 9.25 ounces is 19.3%.
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It should be 120 as well, but if not try 60.
With the mean, you have to add up all of the numbers on the bottom, and then divide by how many there are.