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victus00 [196]
3 years ago
8

Could someone answer this for me please? Thank you!

Mathematics
1 answer:
katovenus [111]3 years ago
4 0
I hope this helps! The data they give you gives you coordinate points that will help you solve the problem!

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If 28% of students in College are near-sighted, the probability that in a randomly chosen group of 20 College students, exactly
cluponka [151]

Answer: (D) 16%

Step-by-step explanation:

Binomial probability formula :-

P(x)=^nC_xp^x(1-p)^n-x, where n is the sample size , p is population proportion and P(x) is the probability of getting success in x trial.

Given : The proportion of students in College are near-sighted : p= 0.28

Sample size : n= 20

Then, the the probability that in a randomly chosen group of 20 College students, exactly 4 are near-sighted is given by :_

P(x=4)=^{20}C_4(0.28)^4(1-0.28)^{20-4}\\\\=\dfrac{20!}{4!16!}(0.28)^4(0.72)^{16}\\\\=0.155326604912\approx0.16\%

Hence, the probability that in a randomly chosen group of 20 College students, exactly 4 are near-sighted is closest to 16%.

7 0
3 years ago
Systems of equations, solve by substitution please!<br> x + 7y = -37<br> 4x - 3y = 7
Svetradugi [14.3K]
Answer:

1. x = -37 - 7y

2. x = 7+3y/4


​​
5 0
2 years ago
Read 2 more answers
Solving systems of equations by substitution -2x-3(6-11)=-7
Papessa [141]

Answer:

11

Step-by-step explanation:

Simplify both sides of the equation.

Subtract 15 from both sides.

Divide both sides by -2.

x = 11

3 0
3 years ago
When is buying a house better than renting?
Anastasy [175]
Well its better ig both ways. If u buy a house then its all ur expectations and all ur money on it. If u rent a house, then if anything u break u can give it to the owner and then they have to pay for it since it is their house.
6 0
3 years ago
If you a flip a coin 6 times, what is the probability that you will get exactly 4 times?
Luden [163]

Answer:So the number of outcomes with exactly 4 tails is 720/2/24 = 15. Finally we can now calculate the probability of getting exactly 4 tails in 6 coin tosses as 15/64 = 0.234 to 3 decimal places.

7 0
3 years ago
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