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3 years ago

11

Keelah's clothing store buys coats for $50 and then sells them for $80 .what is the percent of mark up on the price of the coat

?

1 answer:

meriva3 years ago

3 0

I would say 10% but I'm not really sure

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The Magazine Mass Marketing Company has received 1515 entries in its latest sweepstakes. They know that the probability of recei

wariber [46]

Answer:

$P(x < 5)=P(X=0)+P(X=1)+P(X=2)+P(x=3)+P(X=4)$

$P(X=0)=(15C0)(0.5)^0 (1-0.5)^{15-0}=0.0000305$

$P(X=1)=(15C1)(0.5)^1 (1-0.5)^{15-1}=0.000458$

$P(X=2)=(15C2)(0.5)^2 (1-0.5)^{15-2}=0.0032$

$P(X=3)=(15C3)(0.5)^3 (1-0.5)^{15-3}=0.0139$

$P(X=4)=(15C4)(0.5)^4 (1-0.5)^{15-4}=0.0417$

And adding we got:

$P(x < 5)=0.0592$

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".

Solution to the problem

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

$X \sim Binom(n=15, p=0.5)$

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:

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

And we want to find this probability:

$P(x < 5)=P(X=0)+P(X=1)+P(X=2)+P(x=3)+P(X=4)$

$P(X=0)=(15C0)(0.5)^0 (1-0.5)^{15-0}=0.0000305$

$P(X=1)=(15C1)(0.5)^1 (1-0.5)^{15-1}=0.000458$

$P(X=2)=(15C2)(0.5)^2 (1-0.5)^{15-2}=0.0032$

$P(X=3)=(15C3)(0.5)^3 (1-0.5)^{15-3}=0.0139$

$P(X=4)=(15C4)(0.5)^4 (1-0.5)^{15-4}=0.0417$

And adding we got:

$P(x < 5)=0.0592$

7 0

3 years ago

HELP! 7th grade math! GIVE CORRECT ANSWER AND YOU WILL GET BRAINLIEST!!

blsea [12.9K]

Answer:

The lines are parallel

Step-by-step explanation:

x - y = 2

Solving for y

-y = -x+2

y = x -2

And the other equation is

y = x+1

These are both in slope intercept form

We notice that the slopes are both 1, but the y intercepts are different

That means the lines are parallel, but have different y intercepts

8 0

3 years ago

Please help<br>20 POINTS

otez555 [7]

Answer:

Step-by-step explanation:

To find the probablility, add all of the possibilities. Then, divide the outcome by the total possibilities.

x+3x+5x+4x=13x

x/13x=1/13.

So, the probabilit is 1/13.

5 0

3 years ago

If q is between 0 degrees and 90 degrees and tan deta =7/8 find cosine deta

sertanlavr [38]

Answer:

question is unclear

Step-by-step explanation:

I dont know

4 0

3 years ago

6 (2×^2-5)= ?<br><br>x= -3<br><br>needs to be simplified

aivan3 [116]

I hope this helps you

3 0

3 years ago