Question

Find Arithmetic mean of even numder among the frist 10 natural numder​

Answer 1

Answer:

Step-by-step explanation:

11

Answer 2

means= sum of all observation / total no of observation

now

1,2,3............10.

here , a=1 (first term)

d=a2-a1(common difference) =1

now,

sum of all observation can be given by

Sn=n/2(a+l) where l=last term

that's S 10= 5(1+10)

=55

therefore mean = 55/10=5.5