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The weights of bags of ready-to-eat salad are normally distributed with a mean of 290 grams and a standard deviation of 10 grams. What percent of the bags weigh less than 280 gr…
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The weights of bags of ready-to-eat salad are normally distributed with a mean of 290 grams and a standard deviation of 10 grams. What percent of the bags weigh less than 280 gr…
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Jan 9, 2019
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The weights of bags of ready-to-eat salad are normally distributed with a mean of 290 grams and a standard deviation of 10 grams.
What percent of the bags weigh less than 280 grams?
a) 13.5%
b) 16%
c) 34%
d) 36.5%
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Raajkumar
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290-10=280
280 is one standard deviation below.
All that are above mean is 50%.
One standard deviation below is 34%.
50%+34%=84% all of these bags weigh more than 280 g.
So,
100%-84%=16% should be bags that are less than 280 g.
Answer is b) 16 %.
Avijit Gupta
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Jan 13, 2019
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