Question

answer to this question

Answer 1

I) mean of 2,5,p,8 is 6

=(2+5+p+8)/4=6

=(15+p)/4=6

=15+p= 24

p=9

ii) mean of 6,8,10,3,7,m is 7

(6+8+10+3+7+m)/6=7

(34+m)/6=7

34+m=42

m= 8

iii) mean of 1,7,5,3,4,4 is m

(1+7+5+3+4+4)/6=m

24/6=m

m= 4

so m-1 will be 4-1 = 3

mean of 3,2,4,2,3,3,p is m-1 which is 3

(3+2+4+2+3+3+p)/7=3

(14+p)/7=3

14+p=21

p=7

Answer 2

Formula used,
Average = Sum of all observations/Total number of observations.