Jambmaths question:
|
Mark |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
|
No of student |
3 |
4 |
1 |
0 |
4 |
5 |
2 |
1 |
The table above shows the distribution of marks in a test. Find the probability of passing the test if the pass mark is 5
Jamb Maths Solution:
Probability =$\frac{no\text{ }of\text{ }expected\text{ }outcome}{no\text{ }of\text{ }total\text{ }possible\text{ }outcome}$
Total possible outcome =3+4+1+0+4+5+2+1=20
No of those whose scored 5 and above = 0+4+5+2+1 =12
Prob. Of passing $\frac{12}{20}=\frac{3}{5}$
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