Grade 12th pass9 grade maths
The mean of the following frequency table is 53. But the frequencies f1 and f2 in the classes 20-40 and 60-80 are missing. Find the missing frequencies.
Age (in years) 0-20 20-40 40-60 60-80 80-100 Total
No. of people 15 f1 21 f2 17 100
A) f1=20,f2=28
B) f1=17,f2=19
C) f1=19,f2=25
D) f1=18,f2=29
The mean of the following frequency table is 53. But the frequencies f1 and f2 in the classes 20-40 and 60-80 are missing. Find the missing frequencies.
Age (in years) 0-20 20-40 40-60 60-80 80-100 Total
No. of people 15 f1 21 f2 17 100
A) f1=20,f2=28
B) f1=17,f2=19
C) f1=19,f2=25
D) f1=18,f2=29
