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emmasim [6.3K]
2 years ago
5

Betty's bite-size candies are packaged in bags. The number of candies per bag is normally distributed, with a mean of 50 candies

and a standard deviation of 3. At a quality control checkpoint, a sample of bags is checked, and 4 bags contain fewer than 47 candies. How many bags were probably taken as samples?
Mathematics
2 answers:
muminat2 years ago
7 0

Answer:

D. 25 bags

Step-by-step explanation:

Gala2k [10]2 years ago
5 0
47 = 50 - 3   or:
47 = Mean - 1 Standard deviation
For normal distribution it means that 4 bags represent 16 % of all samples.
4 bags  ------ 16%
x bags  ------ 100 %
---------------------------
4 * 100 = x * 16
16 x = 400
x = 400 : 16
x = 25
Answer: 25 bags were probably taken as samples.
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Answer:

number of shells zoe gives to dev  = 7

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Step-by-step explanation:

let the initial number of shells that dev has be A, and initial number of shells that zoe has be B.

let the number of shells that zoe gives to dev be x.

after giiving x shells zoe is left with 3 times the number of shell as that of dev.

therefore number of shells with zoe = 3×number of shells with dev.

number of shells with zoe = initial shells - x = 55-x

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55-27=3x+x

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x= 7

therefore number of shells zoe gives to dev  = 7

number of shells zoe is left with  = 55-7= 48

number of shells dev has = 9+7=16

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