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
Contact [7]
2 years ago
12

The phone lines to an airline reservation system are occupied 45% of the time. Assume that the events that the lines are occupie

d on successive calls are independent. Assume that eight calls are placed to the airline.(a) What is the probability that for exactly two calls the lines are occupied
Mathematics
1 answer:
dimaraw [331]2 years ago
7 0

Answer:

0.1569 = 15.69%

Step-by-step explanation:

If eight calls were placed, and we need to know the probability of exactly two calls were occupied, we need to calculate a combination of 8 choose 2 (all the combinations of 2 occupied calls in the 8 total calls), and multiply by the probability of each case in the 8 calls (2 cases occupied and 6 cases not occupied):

P(8,2) = C(8,2) * p(occupied)^2 * p(not_occupied)^6

P(8,2) = (8*7/2) * (0.45)^2 * (0.55)^6

P(8,2) = 28 * 0.2025 * 0.02768 = 0.1569 = 15.69%

You might be interested in
What is the slope of the linear equation 30x-60y=12
crimeas [40]

Answer:

60y = 30x - 12

y = 1/2x - 1/5

The slope is 1/2

5 0
3 years ago
Read 2 more answers
Write a kinda short song about 1 polygon with a familiar tune
STALIN [3.7K]
A triangle is A polygon with 3 angles(x2) 3 sides
3 0
3 years ago
How to add and subtract positive and negative fractions
Dvinal [7]
Rules for adding: if the bases are the same you can add them, and subtracting happens in a fraction
5 0
2 years ago
Read 2 more answers
(4 - x)(3+ 2x) = .................... ​
Norma-Jean [14]

Answer:

-2x^2+5x+12

Step-by-step explanation:

(4-x)(3+2x)

12-3x+8x-2x^2

12+5x-2x^2

-2x^2+5x+12

8 0
2 years ago
Find the product and 220 and 4
Alecsey [184]
220 x 4 = 880. //////
6 0
2 years ago
Read 2 more answers
Other questions:
  • How to write 10-3 two ways
    11·1 answer
  • It’s just 2.a answer please
    15·1 answer
  • Find the distance along an arc on the surface of the earth that subtends a central angle of 6 minutes (1 minute = 1/60 degree).
    12·1 answer
  • State the horizontal asymptote of the rational function.
    6·1 answer
  • How do I calculate the distance between these two lines?<br><br> Y=-2/3x - 1/2 and Y=-2/3 + 1/5
    13·1 answer
  • A water park charges $6 for admission and $1.50 for each ride ticket. You have $36. How many ride tickets can you buy? Graph you
    12·2 answers
  • Which ratio is equal to 27 : 81?
    12·1 answer
  • Johnny combined 7/4 cups of pancake mix and 3/4 of a cup of water to
    13·1 answer
  • (A.5C) What is the value of x in the solution to the system of equations below?
    7·1 answer
  • Find the value of the variable.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!