1.

Find the mode of the following distribution of marks obtained by 80students:Marks obtained   0-10         10-20                           20-30       30-40                           40-50No. of students   6              10                           12            32                           20

Answer» In this question, Modal class is 30-40. So, `l` is 30.
Frequency of Modal class`(f) `= 32
Frequency of Pre Modal class`(f1)` = 12
Frequency of succeeding Modal class`(f2)` = 20
Interval`(i)` = 10
We know, Mode = `l+((f-f1)/(2f-f1-f2))**i`
Putting tthe above values in formula,
Mode = `30+((32-12)/(2**32-12-20))*10`
= `30+(20**10/32)`
`Mode = 36.25`


Discussion

No Comment Found

Related InterviewSolutions