Question

The mean of five numbers is 80, out of which mean of 4 numbers is 46, find the 5th number:​

Answer 1

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Answer 2

Answer:

let the five numbers be a,b,c,d and e

so, (a+b+c+d+e)/5=80

(a+b+c+d+e)=80×5

(a+b+c+d+e)=400.......-(i)

and, (a+b+c+d)/4=46

(a+b+c+d)=46×4

(a+b+c+d)=184...........-(ii)

now, (i)-(ii)

(a+b+c+d+e)-(a+b+c+d)=400-184

a+b+c+d+e-a-b-c-d=216

a-a+b-b+c-c+d-d+e=216

e=216

hence,the value of fifth number is 216

Step-by-step explanation:

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