Answer: The probability that at least 4 boys will find one that commutes to school with bicycle is 10% or 0.1 or 1/10
<u>Given:</u>
40% ride bicycle to school
4 boys have to pick 1
Step-by-step explanation:
40% ⇒ 40/100
⇒
= 10 ⇒ 10% or 0.1 or 1/10
Answer:
0.2348 = 23.48% probability that four will have used the e-ticket check-in kiosk to obtain boarding passes.
Step-by-step explanation:
Hypergeometric distribution:
The probability of x sucesses is given by the following formula:
In which:
x is the number of sucesses.
N is the size of the population.
n is the size of the sample.
k is the total number of desired outcomes.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.
In this question:
Population of 280, which means that
112 use e-ticket check-in kiosk, which means that
Sample of eight passengers means that
Find the approximate hypergeometric probability that four will have used the e-ticket check-in kiosk to obtain boarding passes.
This is P(X = 4). So
0.2348 = 23.48% probability that four will have used the e-ticket check-in kiosk to obtain boarding passes.