What is the value of x
1 answer:
You might be interested in
Answer:
<h2>a) 15% b) 10.25</h2>Step-by-step explanation:
Probability is the likelihood or chance that an event will occur.
Probability = number of expected outcome/total outcome.
a)Total number of student is the total outcome = 40
Expected number of outcome is the number of students who bought 20 or more books = 6 (number of students who bought 20-24 books)
Probability of those students who bought 20 or more books = 6/40 = 0.15
Expressing as percentage = 0.15 * 100 = 15%
This means that 15% of the total students bought 20 or more books
b) Mean is calculated using the formula
f is the frequency
x is the midpoint of the class interval
N is the total number of students.
Check the attachment for the frequency table.
Mean number of books bought is 10.25
