1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
anzhelika [568]
2 years ago
12

A survey of high school juniors found that 82% of students plan on attending college. If you pick three at random, what is the p

robability that at least two plan on attending college? Round to the nearest percent.
I answered the question incorrectly, thinking it was 36% but the correct answer was 91%. Can someone please tell me what I did wrong and what is the rule or process I need to take. The book never showed me any other way to solve this just this: P(x) = nCx P^x q^n-x, I just want to learn the right way to avoid mistakes again for the upcoming test.
Please and thank you
Mathematics
1 answer:
Andrew [12]2 years ago
6 0

Answer:

91%

You forgot to add 'all three'

Step-by-step explanation:

X ~ B(3, 0.82)

q = 1 - 0.82 = 0.18

Atleast 2 means:

X = 2, or 3

3C2(0.82)²(0.18) + 3C3(0.82)³(0.18)⁰

= 0.363096 + 0.551368

= 0.914464

= 91.4464%

You might be interested in
Catherine and Lance open a savings account at the same time. Catherine deposits $100 initially and adds $20 per week. Lance depo
docker41 [41]

Answer:

After 40 weeks

Step-by-step explanation:

To get the answer to this question, we need to first know the difference in the amount of money deposited by the 2 individuals and in this case it us $400 since one deposited $500 and the other $100

The next thing to do is to divide the difference in amount(400) by the amount contributed by each person per week.

Catherine deposits $20 per week

400/20 = 20

Lance deposits $10 per week

400/10 = 40

The LCM between 40 and 20 is 40 weeks.

Therefore, both individuals need to deposit money for 40 weeks for both of their savings to be the same.

If Catherine deposits $20 for 40 weeks,she will have 40 × 20 = $800 + $100(initial deposit that she made) = $900

Lance deposits $10 for for 40 weeks and he will have 40 × 10 = $400 + $500(initial deposit made by him)= $900

4 0
2 years ago
Read 2 more answers
Please help me it’s due today at 3:00pm will mark brainiest please help me please
tensa zangetsu [6.8K]

Answer: 83

Step-by-step explanation:

(88+92+87+x)/4 = 90

(277+x)/4 = 90

x+ 277 = 360

x = 83

5 0
3 years ago
Read 2 more answers
The bank charged TENLEY $30 fee because her balance dropped below $0. She knows that she currently has an outstanding charge of
Korolek [52]

Answer:

Tenley has to deposited any amount from $50 and above.

Step-by-step explanation:

From the above question, we can deduce that if your bank balance is below 0, = - , you would be charged $30

Hence,

First she has to pay the bank charges of $30, and to prevent the outstanding charge of $19.95 for generating about charge she has to deposit any amount above $19.95

The amount she has to deposit is

$30 + (x > $19.95)

Assuming x is $20 and above

= $30 + $20 = $50

Hence, Tenley has to deposited any amount from $50 and above.

7 0
2 years ago
Given a = 7.6, A = 50 degrees, and b = 4.3, use the Law of Sines to solve for B. Round
meriva

Answer:

we need the figure, where is it

3 0
2 years ago
Selena's favorite chocolate chip cookie recipe calls for 111 teaspoon of salt for every {2 \dfrac{1}{4}}2
NeTakaya

Answer:

It is deepak's just trust me

Step-by-step explanation:

7 0
2 years ago
Other questions:
  • Can you please simplify -9(2x-4)
    8·2 answers
  • Responde el siguiente problema de lógica: Al mirar el reloj, vemos que la manecilla de los minutos apunta a un número que casual
    13·1 answer
  • What is the completely factored form of 25x4 – 16y2?
    10·2 answers
  • Help please!!!!!! I can’t figure it out.
    6·2 answers
  • PLEASE HELP Knowing that the apothem, radius and half a side of a regular polygon together form a right triangle as shown below,
    9·1 answer
  • Pierre inherited S269,100 from his uncle and decided to invest the money. He put part of the
    10·1 answer
  • Which estimate best describes the area under the curve in square
    14·1 answer
  • PLEASE HELP ME RIGHT AWAY
    6·2 answers
  • Make x the subject of the formula y=7x + 4
    10·2 answers
  • Can someone please answer it, please no bots answer it and a real person I will give you brainliest.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!