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3 years ago

20 is 16% of what number?

Mathematics

2 answers:

Taya2010 [7]3 years ago

4 0

It is 80 !!!!!!! That’s the number

gtnhenbr [62]3 years ago

4 0

Answer:

80-

Step-by-step explanation:

20 percent (calculated percentage %) of what number equals 16? . well ofc as i said- its 80

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At lunch a waiter had seven customers and two of them didn’t leave a tip.If he got seven each from the ones who did tip how much

11Alexandr11 [23.1K]

Answer:

$35

Step-by-step explanation:

7 customers - 2 who didn't tip = 5 who did tip

$7 from those who did tip * 5 ppl who tipped = $35 earned

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2 years ago

Which of these numbers is composite? 3,5,19,71,85

user100 [1]

Answer:

Step-by-step explanation:

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3 years ago

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Explain what happens when you round 4.999 to the nearest tenth

Allushta [10]

Tenth place is the first place after the decimal which is 4.999
^
The answer is 4.9

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3 years ago

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Distribute the expression.<br> 5(282-38+4)

kifflom [539]

Answer:

10s²-15s+20 is yr answer..

Step-by-step explanation:

5(2s²-3s+4)
10s²-15s+20

<h3>stay safe healthy and happy.</h3>

6 0

2 years ago

Maggie is practicing her penalty kicks for her upcoming soccer game. During the practice, she attempts 10 penalty kicks. If each

arlik [135]

Answer:

$P(X \geq 8)= P(X=8) +P(X=9) +P(X=10)$

And we can find the individual probabilities like this:

$P(X=8)=(10C8)(0.65)^0 (1-0.65)^{10-8}=0.176$

$P(X=9)=(10C9)(0.65)^1 (1-0.65)^{10-9}=0.072$

$P(X=10)=(10C10)(0.65)^2 (1-0.65)^{10-10}=0.013$

And adding we got:

$P(X \geq 8)= P(X=8) +P(X=9) +P(X=10)= 0.176+0.072+0.013=0.262$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=10, p=0.65)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

$nCx=\frac{n!}{(n-x)! x!}$

Solution to the problem

For this case we want to find this probability:

$P(X \geq 8)= P(X=8) +P(X=9) +P(X=10)$

And we can find the individual probabilities like this:

$P(X=8)=(10C8)(0.65)^0 (1-0.65)^{10-8}=0.176$

$P(X=9)=(10C9)(0.65)^1 (1-0.65)^{10-9}=0.072$

$P(X=10)=(10C10)(0.65)^2 (1-0.65)^{10-10}=0.013$

And adding we got:

$P(X \geq 8)= P(X=8) +P(X=9) +P(X=10)= 0.176+0.072+0.013=0.262$

5 0

3 years ago