Average of some nubers is 20.if each number is increased by 20,what will the new average?
Answers
Answered by
0
is it 400 is it right
x1+x2+x3+.....xn÷n=20
x1+x2+x3+.....xn=20n
x1+20+x2+20+x3+20.....xn+20÷n=?
20 (x1+x2+x3+.....xn)=?×n
20 (20n)=?×n
400n=?×n
?=400
x1+x2+x3+.....xn÷n=20
x1+x2+x3+.....xn=20n
x1+20+x2+20+x3+20.....xn+20÷n=?
20 (x1+x2+x3+.....xn)=?×n
20 (20n)=?×n
400n=?×n
?=400
Similar questions