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Charra [1.4K]
3 years ago
5

A bottling company uses a filling machine to fill plastic bottles with a popular cola. The bottles are supposed to contain 300 m

l. In fact, the contents vary according to a normal distribution with mean μ = 298 ml and standard deviation σ = 3ml.
What is the probability that a randomly selected bottle contains less than 295 ml?
Mathematics
1 answer:
Lana71 [14]3 years ago
5 0

Answer:

0.16

Step-by-step explanation:

For a normal distribution, the 68-95-99.7 rule says that 68% of the distribution lies within 1 standard deviation from the mean, 95% within two standard deviations and 99.7% within three standard deviations.

From the question,

Mean μ = 298 ml

Standard deviation σ = 3 ml

A value of 295 ml is within one standard deviation = 68%.

Since it's on the lower side, it's within 68% ÷ 2 = 34%.

The lower half below the mean is 50% of the distribution. Hence, for a selection less than 1 standard deviation, the probability is

50% - 34% = 16% = 0.16

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