SOLUTION: I hope someone can help me I am stuck. Acme Airlines flies airplanes that seat 12 passengers. From experience, they have learned that, on average, 80% of the passengers

Question 80662: I hope someone can help me I am stuck.
Acme Airlines flies airplanes that seat 12 passengers. From experience, they have learned that, on average, 80% of the passengers holding reservations for a particular flight actually show up for the flight. If they book 13 passengers for a flight, what is the probability that 12 or fewer passengers holding reservations will actually show up for the flight?

a. less than 90% b. between 90 and 95%, inclusive c. more than 95% d. cannot be determined from information given

Let be a normally distributed random variable with and . The probability that is between 80 and 120 is (to the nearest whole percent)
a. 8 % b. 82 % c. 91% d. answer not listed

these two qusetion have been killing me all night thanks for your help Mirna

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Acme Airlines flies airplanes that seat 12 passengers. From experience, they have learned that, on average, 80% of the passengers holding reservations for a particular flight actually show up for the flight. If they book 13 passengers for a flight, what is the probability that 12 or fewer passengers holding reservations will actually show up for the flight?
----
It's a binomial problem: n=13, p=0.8, 0<=x<=12
If you have a TI calculator use 1-binompdf(13,0.8,13)=0.945
If you do not have a TI use 1-(0.8)^13=0.945
================================
a. less than 90% b. between 90 and 95%, inclusive c. more than 95% d. cannot be determined from information given
ANSWER: "b" is the answer.
=====================================================
Let be a normally distributed random variable with and . The probability that is between 80 and 120 is (to the nearest whole percent)
a. 8 % b. 82 % c. 91% d. answer not listed
Comment: A bunch of words are missing from your posting. You will have
to post this problem again.
===============
cheers,
Stan H.

RELATED QUESTIONS
Hello, can someone please help me on this question. A railway company charge... (answered by Mlallory_Pl)

Airlines usually over-book the seats on an aircraft by a certain margin because they know (answered by ewatrrr)

I am stuck on a multiplication problem. I hope someone can help. a^2... (answered by jim_thompson5910)

Can someone help me with this one? I hope I write this out right... (-3*10^-3)... (answered by stanbon,rothauserc)

Can you help me with this? Here is the problem:{{{ sqrt(27x^11y^12)}}} I am trying to (answered by solver91311,josmiceli)

Can someone help me answer -4(3-6d)=9(2d-2)? So far i have gotten to -12-42d+-18, but I... (answered by oberobic)

Please help me solve this equation? {{{sqrt(5x-1)-1=sqrt(x+2)}}} I have tried:... (answered by jim_thompson5910)

I have a homework problem that I am stuck on can someone help me with solving this... (answered by richwmiller)

Two airplanes leave simultaneously from an airport. One flies due south; the other flies (answered by nerdybill)