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3 years ago

Sally can paint a room in 3 hours while it takes Steve 5 hours to paint the same room

Mathematics

1 answer:

Gelneren [198K]3 years ago

5 0

Wait so what’s the question then?

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A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 50.0 and 60.

Artist 52 [7]

Answer: 0.0250

Step-by-step explanation:

Given : A statistics professor plans classes so carefully that the lengths of her classes are uniformly distributed between 50.0 and 60.0 minutes.

We know that the uniform distribution is also known as rectangular distribution.

Density function for uniform distribution : $f(x)=\dfrac{1}{b-a}$

$=\dfrac{1}{60-50}=\dfrac{1}{10}$

Now, the probability that a given class period runs between 51.25 and 51.5 minutes :-

$\int^{51.5}_{51.25}f(x)\ d(x)\\\\ \int^{51.5}_{51.25}\dfrac{1}{10}\ dx\\\\=\dfrac{1}{10} [x]^{51.5}_{51.25}\\\\=\dfrac{1}{10}(51.5-51.25)=0.0250$

Hence, the probability that a given class period runs between 51.25 and 51.5 minutes = 0.0250

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3 years ago

-3 3m2n) Which expression is equivalent to ? 6mn-2

andrezito [222]

Answer:

Step-by-step explanation:

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3 years ago

Find the sum 2/3 + [-1/3]

GenaCL600 [577]

Answer:

1/3

Step-by-step explanation:

2 - 1 is 1

Denominator stays the same

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3 years ago

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Which expression is the same as 5÷3?

astraxan [27]

Answer:

Step-by-step explanation:

5/3 in improper fraction would be 1 2/3. This is because three goes into five once hence the one and you still have two over three left. 5/3 is an improper fraction because the numerator is greater than the denominator.

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Help please..............

Aleonysh [2.5K]

Answer:

Basically ur wrong

Step-by-step explanation:

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