Sita can finish some work in 6 days,
days,Gita can finish the same in
15 days working 3 hours a day.
In how many days they finish the work if they work together for 3 hours per day?

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Ответ:

jay1462

12.03.2020

Mathematics

$z=\frac{20.5-20}{\frac{1.9}{\sqrt{35}}}= 1.557$

And using the normal standard distribution and the complement rule we got:

P(z1.557) =1-P(z

Step-by-step explanation:

For this case we define our random variable X as "fat content per hot dog" and we know the following parameters:

$\mu = 20, \sigma =1.9$

We select a sample of n=35 and we want to find the following probability:

$P(\bar X20.5)$

For this case since the sample size is >30 we can use the central limit theorem and we use the z score formula given by:

$z=\frac{\bar X -\mu}{\frac{\sigma}{\sqrt{n}}}$

Replacing we got:

$z=\frac{20.5-20}{\frac{1.9}{\sqrt{35}}}= 1.557$

And using the normal standard distribution and the complement rule we got:

P(z1.557) =1-P(z

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Sita can finish some work in 6 days,days,Gita can finish the same in15 days working 3 hours a day.In how many days they finish the work if they work together for 3 hours per day?