Question

Find 'p' if the mean of the given data is 15.45.
CLASS
0-6
6-12
12-18
18-24
24-30
FREQUENCY
6
8
p
9
7​

Answer 1

Answer:

SUM OF FREQUENCY OR FI=30+P

SUM OF FIXI=468+15P

MEAN=FIXI/FI

15.45=468+15P/30+P

15.45(30+P)=468+15P

463.5+15.45P=468+15P

15.45P-15P=468-463.5

0.45P=4.5

P=4.5/0.45

P=10