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meriva
3 years ago
13

Answer all those 4 question

Mathematics
1 answer:
Dmitry_Shevchenko [17]3 years ago
7 0
4. 11/3 = 3.667, so 3 in 1 and 4 in 2
5. 11 minutes
6. 33 minutes
7. 36 minutes
i think ;)
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Answer: 0.0475

Step-by-step explanation:

Let x = random variable that represents the number of a particular type of bacteria in samples of 1 milliliter (ml) of drinking water, such that X is normally distributed.

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The probability that a given 1-ml will contain more than 100 bacteria will be:

P(X>100)=P(\dfrac{X-\mu}{\sigma}>\dfrac{100-85}{9})\\\\=P(Z>1.67)\ \ \ \ [Z=\dfrac{X-\mu}{\sigma}]\\\\=1-P(Zz)=1-P(Z

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