Set of 30 nos,average of 1st 10 nos=avg of last 20 nos.the sum of last 20 nos is
a)sum of 1st ten nos
b)can’t be determined
c)2*sum of first ten numbers
d)2*sum of last ten nos

• option=c
  let 10 no sum be a then avg=a/10
  let 20 no sum=b then avg=b/20
  a/10=b/20
  b=2*a
• 10 years agoHelpfull: Yes(14) No(0)
• ans z option c.
  atq x1+x2.....+x10/10=x11+x12+.....+x30/20
  den v get,x11+x12+.....+x30=2*(x1+x2+....+x10)ie 2*sum of first 10 terms.
• 10 years agoHelpfull: Yes(3) No(0)