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Mathematics

2 answers:

Semenov [28]3 years ago

8 0

8 because it’s the average between 4 and 10

Anestetic [448]3 years ago

8 0

Your answer would be 16!

10+16+4=30

30/3=10!

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At Dorothy's Hair Salon, 4 gallons of shampoo will last 3 weeks. She has 7 gallons of shampoo. How much more must she order if s

Katen [24]

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Step-by-step explanation:

5 0

4 years ago

8-2b = -2 find the solution to the equation

Paul [167]

Answer: 5

Step-by-step explanation:

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4 years ago

A large disaster cleaning company estimates that 30 percent of the jobs it bids on are finished within the bid time. Looking at

Y_Kistochka [10]

Answer:

There is a 13.61% probability that exactly 4 of the jobs were not completed within the bid time.

Step-by-step explanation:

For each job, there are only two possible outcomes. Either they are completed on time, or they are not. This means that we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

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

And p is the probability of X happening.

Looking at a random sample of 8 jobs that it has contracted, calculate the probability that exactly 4 of the jobs were not completed within the bid time.

There are 8 jobs, so $n = 8$ .