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Aloiza [94]
3 years ago
13

One hundred tickets, numbered 1,2,3, ,100, are sold to 100 different people for a drawing. four different prizes are awarded, in

cluding a grand prize (a trip to tahiti).
Mathematics
1 answer:
Serjik [45]3 years ago
6 0

There are four questions related to this: how many number of ways are there to award the prizes if:

a)      There are no restrictions?  If k unalike awards are there for n people and no person can get more than one prize then there are: This leads to 100 × 99 × 98 × 97 = 94109400100 × 99 × 98 × 97 = 94109400 ways in your case where n=100 k=4.

b)The person holding ticket 47 wins the grand prize? After handing out the grand prize there are k=3 different rewards left for n = 99 persons. Apply the same formula. Answer: 941094941094

c)  The person holding ticket 47 wins one of the prizes? 4 times case because there are 4 likelihoods when it comes to the rewards that can be won by person 47. Answer: 37643763764376 


d) The person holding ticket 47 does not win a prize? k=4 and n =99. Person 4747 is left out. Answer: 9034502490345024 


e) The person holding ticket 19 and 47 both wins prize? First gave out a prize to 47. There are 4 possibilities. Then give out a prize to 19. There are 3 likelihoods. Then the other prizes are gave out: k=2 and n=98. Lastly you come to 4 × 3 × 98 × 97 =1140724 × 3 × 98 × 97 = 114072 possibilities.

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Experts have predicted that approximately 1 in 12 tractor-trailer units will be involved in an accident this year. One reason fo
Yuliya22 [10]

Answer:

1. 564 tractor trailers

2. (0.2919, 0.4339)

3. It should be noted that there is 90% confidence that the true population proportion lies between 0.2919 and 0.4339.

Step-by-step explanation:

1)

Proportion= P = 0.8333333333333 (1/12)

Margin error= 0.06/2 = 0.03

Confidence level= 99

Significance level = α= (100 - 99)%= 1%= 0.01

α/2 = 0.01/2 = 0.0005

Sample size= n

= p(1 - p) (Z*/E)

=0.8333333333333 x (2.576/0.03)^2

=563.15

Approximately

=564

2) Sample size n= 124

Sample number of event x =45

Sample proportion = p= x/n

=45/124

= 0.3629

Standard error =√p(1 - p) /n

√(0.3629× (1 - 0.3629)/ 124

= 0.0432

Confidence level= 90

Significance level α= (100-90)% =0.01

Critical value Z* = 1.645

Margin of error = Z×Standard error= 1.645 × 0.0432= 0.07103

Lower limit = p- margin error= 0.3629 - 0.07103= 0.2919

Upper limit = p+margin error= 0.3629 + 0.07103= 0.4339

The answer is (0.2919, 0.4339)

3) It should be noted that there is 90% confidence that the true population proportion lies between 0.2919 and 0.4339.

5 0
4 years ago
Identify the horizontal asymptote of f(x) = quantity 2 x minus 1 over quantity x squared minus 7 x plus 3.
Rina8888 [55]
We must recall that a horizontal asymptote is the value/s of y that the given function approaches to but never reaches. To find this in a rational function, we compare the expressions with highest degree in the numerator and denominator. There are three possible outcome when this happens.

1. if the highest degree (highest exponent) in the numerator is bigger than that of the denominator, then there won't be any horizontal asymptote.

2. if the highest degree in the denominator is bigger, then the horizontal symptote would be y = 0.

3. if they have the same highest degree, then we just get the quotient of their coefficient. 

Now, going back to our function, we have

f(x) = \frac{2x - 1}{x^{2} - 7x + 3}

From this we can see that the highest degree in the numerator is 1 (from 2x) and 2 (from x²) for the denominator. Clearly, it shows that its denominator has a higher degree. And from our discussion, we can conclude that the horizontal asymptote would be y = 0.

Answer: y = 0
3 0
4 years ago
2. A researcher collected data about the favorite car color of a particular population. He asked 250 people about their favorite
lubasha [3.4K]
A) 55 people said their favorite vehicle color is red

B) 80 people said their favorite vehicle color was blue while 60 people said their favorite vehicle color was white

C) 45 said their favorite vehicle color was black while 10 people said their favorite vehicle color was silver
8 0
4 years ago
PLEASE HELPP quickkk
ELEN [110]

Answer: x by 4 to get (4, 5.12) or y = 5.12

Step-by-step explanation:

0.02x 4 = 0.08

0.08x 4 = 0.32

0.32x 4 = 1.28

7 0
3 years ago
EXTRA POINTS WILL MARK BRAINLIEST ONLY HAVE TEN MINS
snow_tiger [21]
1.5 !!!

Multiply 2/3 by 9/4
5 0
3 years ago
Read 2 more answers
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