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3 years ago

EVAN

Mathematics

1 answer:

CaHeK987 [17]3 years ago

3 0

Answer:

n = -8

Step-by-step explanation:

Given the expression

(-2y-3) + (-6y-5) = (ny -8),

Expanding the LHS

-2y-3 - 6y -5 = ny - 8

-2y-6y-3-5 = ny - 8

-8y - 8 = ny - 8

Compare both sides

-8y = ny

-8 = n

Swap

n = -8

Hence the value of n is -8

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Thirty percent of all customers who enter a department store will make a purchase. Suppose that 6 customers enter the store and

torisob [31]

Answer:

Step-by-step explanation:

Let's use binomial distribution, because we are interested in find the total number of successes in a sequence of n independent experiments.

In probability, a binomial distribution is used in a Bernoulli process. That is, a sequence of experiments of n independent trials, each asking a dichotomous question, that means it only has two answers. One answer is a success (probability: p) and the other is a failure (probability: 1-p). In this case, every customer who enters in the store is the experiment. If they make a purchase is a success event, taking into account that every purchase decision has to be independent.

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

x= total number of success

n= total number of experiments

p=probability of success on an indivual trial

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

a) x= 5 ------> customers that make a purchase

n= 6 ------> total customers

p=0.3

$p(X=5)= C(6,5)(0.3)^{5} (1-0.3)^{6-5} \\p(X=5)=0.102$

b) At least 3 customers make a purchase. x ≥ 3

$P(X\geq 3)=1-P (X=0)-P(X=1)-P(X=2)\\P(X\geq 3)=1-(C(6,0)(0.3^{0})(0.7)^{6}) - (C(6,1)(0.3^{1})(0.7)^{5}) - (C(6,2)(0.3^{2})(0.7)^{4})\\ P(X\geq 3) = 1-0.11765-0.30253-0.32414\\P(X\geq3)= 0.2557$

c) At most 2 customers make a purchase. x ≤ 2

$P(X\leq2) = P(X=0) + P(X=1) + P(X=2)\\P(X\leq2) = (C(6,0)(0.3^{0})(0.7)^{6}) + (C(6,1)(0.3^{1})(0.7)^{5}) + (C(6,2)(0.3^{2})(0.7)^{4})\\P(X\leq2) = 0.11765-0.30253-0.32414\\P(X\leq2)=0.7443$

d)At least 1 customer makes a purchase. x ≥ 1

$P(X\geq 1)=1-P(X=0)\\P(X\geq 1)= 1-C(0,6)(0.3)^{0}(0.7)^{6} \\P(X\geq 1)= 1-0.11765 = 0.8824$

e)They must be kind to customers, always willing to help and give information about products clearly and honestly.

Have enough inventory and offer promotions for the purchase of more than one product

Have an agile payment system that avoids rows and delays in purchases.

6 0

4 years ago

587,504 rounded to the nearest ten thousand is

Kobotan [32]

590,000

87,504 it closer to 90,000 that 80,000 so 587,504 rounded to the nearest ten thousand is 59,000

8 0

3 years ago

Read 2 more answers

I need 12 13 and 15 pretty please

PtichkaEL [24]

12) Im not sure about this one

13) c

14)a

6 0

3 years ago

Pls hellp

katrin2010 [14]

Using the arrangements formula, the probability of the butterscotch, cinnamon, and then chocolate candies eaten in this particular order is:

$\frac{1}{6}$ .

<h3>What is the arrangements formula?</h3>

The number of possible arrangements of n elements is given by the factorial of n, that is:

$A_n = n!$

In this problem, there are 3 candies, hence the number of ways they can be eaten is:

$A_3 = 3! = 6$

The desired order is only one, hence the probability is:

$\frac{1}{6}$ .

More can be learned about the arrangements formula at brainly.com/question/24648661

#SPJ1

8 0

2 years ago

Roger and Sulee each decomposed 1 1/6.Roger wrote 1/6+1/6+2/6+3/6.Sulee wrote 3/6+4/6. who is correct? Explain

dybincka [34]

The correct answer is Roger

4 0

3 years ago