Question

the mean of a,b,c,d and e is 28 if the mean of a,c,&e is 24 find the mean of b and d

Answer 1

mean= sum of numbers/total number
28=(a+b+c+d+e)/5

a+b+c+d+e=140
also
24=(a+c+e)/3
a+c+e=72
hence,
b+d=140-72=68
now, mean =(b+d)/2=68/2=34
hence mean of b and d =34