Question

the mean of a,b,c,d&e is 28. If a mean of a,c&e is 24, then the mean of b and d is
a). 3 b). 32 c).33 d)34
explain with steps​

Answer 1

Answer:

d(34)

Step-by-step explanation:

mean = sum of observations/ total observations

mean of a,b,c,d and e= 28

= a+b+c+d+e/5 =28

= a+b+c+d+e= 28*5

=a+b+c+d+e=140....(1)

Now, mean of a,c and e=24

= a+c+e/3= 24

= a+c+e= 24*3

= a+c+e= 72....(2)

put in (1)

a+c+e+b+d=140

72+b+d=140

=b+d= 140-72

= b+d= 68...(3)

Now, mean of b and d=

b+d/2= 68/2= 34!

Hope it helped.

Jai Hind!