Question

the mean of the following distribution table is 24 find the value of p
marks - 0-10 10-20 20-30 30-40 40-50 50-60
number -. 15 20 35 p 10 42
of students​

Answer 1

Step-by-step explanation:

given mean = 24

mark fi xi fixi

0-10 15 5 75

10-20 20 15 300

20-30 35 25 875

30-40 p 35 35p

40-50 10 45 450

50-60 42 55 2310

∑fi=122+p ∑fixi=4010+35p

mean = ∑fixi/∑fi

24 = (4010+35p)/(122+p)

24(122+p) = 4010+35p

2928+24p = 4010+35p

2928-4010 =35p-24p

-1082 = 11p

p = -1082/11

p = -98.3636