A survey was taken on 30 classes at a school to find the total number of left-handed students in each class. The table below shows the results:
|No. of left-handed students||0||1||2||3||4||5|
|Frequency (no. of classes)||1||2||5||12||8||2|
A class was selected at random the probability that the class has at least 3 left-handed students
Asked by Topperlearning User | 9th Apr, 2014, 02:01: PM
Let A be the event of a class having at least 3 left-handed students.
n(A) = 12 + 8 + 2 = 22
Answered by | 9th Apr, 2014, 04:01: PM
- what is probability??
- what is mean
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