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11111nata11111 [884]
3 years ago
11

Will give brainiest if answered first plz helppp!!!!

Mathematics
2 answers:
Korolek [52]3 years ago
8 0

Answer:

The answer is b

Step-by-step explanation:

mylen [45]3 years ago
8 0

The answer is B.

Since I cant post it until I have 20 letters, lets start a conversation.

Hello. How is your day/night going so far?

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A representative from the National Football League's Marketing Division randomly selects people on a random street in Kansas Cit
Orlov [11]

Using the binomial distribution, we have that:

a) 0.1024 = 10.24% probability that the marketing representative must select 4 people to find one who attended the last home football game.

b) 0.2621 = 26.21% probability that the marketing representative must select more than 6 people to find one who attended the last home football game.

c) The expected number of people is 4, with a variance of 20.

For each person, there are only two possible outcomes. Either they attended a game, or they did not. The probability of a person attending a game is independent of any other person, which means that the binomial distribution is used.

Binomial probability distribution  

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

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

The parameters are:

  • p is the probability of a success on a single trial.
  • n is the number of trials.
  • p is the probability of a success on a single trial.

The expected number of <u>trials before q successes</u> is given by:

E = \frac{q(1-p)}{p}

The variance is:

V = \frac{q(1-p)}{p^2}

In this problem, 0.2 probability of a finding a person who attended the last football game, thus p = 0.2.

Item a:

  • None of the first three attended, which is P(X = 0) when n = 3.
  • Fourth attended, with 0.2 probability.

Thus:

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

P(X = 0) = C_{3,0}.(0.2)^{0}.(0.8)^{3} = 0.512

0.2(0.512) = 0.1024

0.1024 = 10.24% probability that the marketing representative must select 4 people to find one who attended the last home football game.

Item b:

This is the probability that none of the first six went, which is P(X = 0) when n = 6.

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

P(X = 0) = C_{6,0}.(0.2)^{0}.(0.8)^{6} = 0.2621

0.2621 = 26.21% probability that the marketing representative must select more than 6 people to find one who attended the last home football game.

Item c:

  • One person, thus q = 1.

The expected value is:

E = \frac{q(1-p)}{p} = \frac{0.8}{0.2} = 4

The variance is:

V = \frac{0.8}{0.04} = 20

The expected number of people is 4, with a variance of 20.

A similar problem is given at brainly.com/question/24756209

3 0
1 year ago
Which one is the better deal, the 8 inch little zip for $6.25 or the 11 inch big zip for $7.75.
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Answer:

the 11 inch big zip for 7.75

Step-by-step explanation:

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Answer:

6

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I think so 6 because I think so

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your classmate tells you the details of the great deal he got on his mortgage: 30- year 3.5% fixed rate with a 10% down payment.
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Answer:

$13,600

Step-by-step explanation:

If he puts a down payment of 10% on $136,000

Then is should be $13,600

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When mixed together in varying degrees, the three primary additive colors, consisting of ________, can produce all the other col
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Red, Blue, Yellow

Step-by-step explanation:

The three primary colors are red, blue, and yellow.

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2 years ago
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