Scores Frequency (f) 0
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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hey
I want the answer of (d) please
Transcribed Image Text:Task 3:
1) The table below shows the scores of 50 students in a math test.
Scores
Frequency (f)
0<t< 10
2х
10 <t< 20
17
20 <t < 30
13
30 <t< 40
3x
a) Find the value of x.
b) Calculate an estimate of the mean score.
c) Find the modal class.
d) Ahmad said “The probability of choosing randomly a student with a score more than 30 is 50%".
Is Ahmad correct? Explain your answer.
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