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Rainbow [258]
3 years ago
10

Mia's office recycled a total of 9 pounds of paper over 3 weeks. After 7 weeks, how many pounds of paper will Mia's office have

recycled?
Options:
24
21
15
18
Mathematics
1 answer:
tankabanditka [31]3 years ago
5 0

Answer:

21

Step-by-step explanation:

average 9 pounds per three weeks

divide 9 in 3 three weeks

3 pounds per week

7 times 3 is 21

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A Department of Transportation survey showed that 60% of U.S. residents over 65 years of age oppose use of cell phones in flight
Shalnov [3]

Answer:

a) P(X=12)=(25C12)(0.6)^{12} (1-0.6)^{25-12}=0.0760

b) P(X>17) = P(X=18) +....+P(X=25)

And we can use the following excel code: "=1-BINOM.DIST(17;25,0.6,TRUE)"

And we got:

P(X>17) = P(X=18) +....+P(X=25)= 0.154

c) P(X

And using the following excel code we got: "=BINOM.DIST(7,25,0.6,TRUE)"

And we got:

P(X

Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

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".

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!}  

The complement rule is a theorem that provides a connection between the probability of an event and the probability of the complement of the event. Lat A the event of interest and A' the complement. The rule is defined by: P(A)+P(A') =1

Solution to the problem

Part a

P(X=12)=(25C12)(0.6)^{12} (1-0.6)^{25-12}=0.0760

Part b

For this case we want this probability:

P(X>17) = P(X=18) +....+P(X=25)

And we can use the following excel code: "=1-BINOM.DIST(17,25,0.6,TRUE)"

And we got:

P(X>17) = P(X=18) +....+P(X=25)= 0.154

Part c

For this case we want this probability:

P(X

And using the following excel code we got: "=BINOM.DIST(7,25,0.6,TRUE)"

And we got:

P(X

4 0
3 years ago
If my wife owns 150 CDs and 20% of them are by boy bands - how many Boy band CDs does she own?​
LuckyWell [14K]
You can use a calculator or you could change the percent to a fraction. 20% is equivalent to 20/100.

So just multiply 150 by 20 and divide that answer by 100 to get a number of 30 CDs of boy bands
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Plz help!!! i’ll mark brainliest!!!!
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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