Math, asked by Harshrock1072, 1 year ago

Find the arithmetic mean of all even numbers between 81 and 101

Answers

Answered by CaptainBrainly
2
HEYA!!!!

Even Numbers between 81 and 101 are - 81,84,86,88,90,92,94,96,98,100

Mean = sum of obs / number of observations

Mean = 82+84+86+88+90+92+94+96+98+100/10

= 910/ 10

= 91..

Therefore, Mean = 91..


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Answered by roopashree2
0
82,84,86,88,90,92,94,96,98,100
here a=82 and
d=2 then
tn=a+(n-1)d
100=82+(n-1)2
18=2n-2
n=20/2
n=10
Sn=n/2(2a+(n-1)d)
Sn=5(164+(9)(2))
Sn=910
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