Jambmaths question:
The bar chart above shows the distribution of marks in a class test. If the pass mark is 5, what percentage of the students failed the test?
Option A:
10%
Option B:
20%
Option C:
50%
Option D:
60%
Jamb Maths Solution:
Number of students who scored less than 5 is 2 + 3 + 4 + 6 + 5 =20
Total number of students = 2 + 3 + 4 + 6 + 5 + 4 + 6 + 5 + 1 + 3 + 1 = 40
Percentage of those who failed = $\frac{20}{40}\times 100percent=50percent$
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