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3 years ago

14

How many quarters if she delivers 21 newspapers

1 answer:

evablogger [386]3 years ago

8 0

525...............;0;0

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An important part of the customer service responsibilities of a cable company relates to the speed with which trouble in service

neonofarm [45]

Answer:

$P(X < 2)=P(X \leq 1)=P(X=0)+P(X=1)=0.000977+0.0146=0.0156$

Step-by-step explanation:

1) 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".

2) Solution to the problem

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

$X \sim Binom(n=5, p=0.75)$

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:

$P(X < 2)=P(X \leq 1)=P(X=0)+P(X=1)$

$P(X=0)=(5C0)(0.75)^0 (1-0.75)^{5-0}=0.000977$

$P(X=1)=(5C1)(0.75)^1 (1-0.75)^{5-1}=0.0146$

$P(X < 2)=P(X \leq 1)=P(X=0)+P(X=1)=0.000977+0.0146=0.0156$

8 0

3 years ago

How to solve and graph the inequality

frozen [14]

For this problem the work would look like this:

$-\frac{w}{2} \geq -7\\ \\$

Multiply -2 to both sides to isolate w.

$w\leq -7*-2$

Notice that the sign flips! This is because anytime a negative numbers transfers to the other side of the inequality the inequality flips directions.

$w\leq 14$

Now this should be the solution once solving.

The attached picture below shows the graph.

Hope this helps!

4 0

3 years ago

Can anyone help me please solving these maths problems, first time. Thanks.

olga_2 [115]

I think the answer is 2/2

5 0

4 years ago

Determine which car gets the better gas mileage. Car A: Distance (miles) 400 Gallons used: 12 Car B: Distance (miles) 440 Gallon

kherson [118]

So on one galon of gas car A would travel 33 1/3 miles, while car B would travel 29 1/3 miles. Answer: Car A

A: 400 / 12 = 33 1/3

B: 440 / 15 = 29 1/3

8 0

3 years ago

The cafeteria sold 30 more oranges and apples. The cafeteria sold 270 oranges. How many apples did they sell?

bogdanovich [222]

Hi Arie,

Solution:

270 - 30 = 240

Answer:

They sold 240 apples!

7 0

3 years ago

Read 2 more answers