Draw histogram MARKS 0-20 20-40 40-60 60-100 NO of students 10 15 20 24
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Value of a = 12 and value of b = 24
Step-by-step explanation:
Thee following table is given the marks obtained by the students.
Total number of students = 100
Therefore, 9 + a + 40 + b + 15 = 100
As per given statement the value of b is twice the value of a.
Hence, b = 2a
Now put the value of b in the equation (1)
9 + a + 40 + 2a + 15 = 100
a + 2a = 100-9-40 - 15
3a = 36
a = 12 b = 2(12) = 24
Value of a = 12 and value of b = 24
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