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asambeis [7]
3 years ago
7

NEED HELP WIll GIVE THE BRAINLIEST

Mathematics
2 answers:
Fiesta28 [93]3 years ago
8 0

Answer:

the answer is B.

Step-by-step explanation:

:))))))

Semmy [17]3 years ago
4 0

9514 1404 393

Answer:

  B)  f(x) = 3

Step-by-step explanation:

The value in the f(x) column is always 3, so the only reasonable choice is ...

  f(x) = 3

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For a group of 100 people, compute(a) the expected number of days of the year that are birthdays of exactly 3 people.(b) the exp
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Answer:

Step-by-step explanation:

Leaving leap years, a year contains 365 days.

For a group of 100 people, each person is independent of the other and probability of any day being his birthday has a chance of

\frac{1}{365}

a) Probability that  exactly 3 people have same birthday = \frac{1}{365^3}

Each day is independent of the other

And hence no of days having exactly 3 persons birthday out of 100 persons is binomial with n = 365 and p = \frac{1}{365^3}

Expected value of days = np = \frac{1}{365^2}

b) Distinct birthdays is binomail with p =1/365 and n = 365

Hence

expected value = np =1

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3 years ago
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Each person would get 1 and left overs r in the trash lel

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Andy is hanging wallpaper in his kitchen. He is able to cover 2 2/5 of the walls in the room using 6 rolls of wallpaper. What is
faltersainse [42]

Answer: The number of rolls of paper is 2\dfrac{1}{2}.

Step-by-step explanation:  Given that Andy is hanging wallpaper in his kitchen. 6 rolls of wallpaper is used to cover 2\dfrac{2}{5} of the walls.

We are to find the number of rolls of paper used per wall.

We will be using unitary method to solve the given problem.

We have,

2\dfrac{2}{5}=\dfrac{12}{5}.

Now, number of rolls used to cover \dfrac{12}{5} of the walls = 6.

Therefore, number of rolls used to cover 1 wall is given by

\dfrac{6}{\frac{12}{5}}=\dfrac{5\times 6}{12}=\dfrac{5}{2}=2\dfrac{1}{2}.

Thus, 2\dfrac{1}{2} rolls of paper used per wall.  

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