two consecutive numbers are removed from the progression 1,2,3...n. The A>M of the remaining numbers is 26 1/4.the value of n is:
a)50
b) 81
c) cannot be determined
d) 60

• mean= (n*(n+1)/2)/n = (n+1)/2
  now (n+1)/2=26 1/4
  solving for n,
  n=50(approx)
  
• 10 years agoHelpfull: Yes(9) No(8)
• when we solve then it vl be
  (n+1)/2=26 1/4
  (n+1)/2=105/4
  (n+1)=105/2
  n=105/2-1
  n=103/2
  n=50(approx)
  
• 10 years agoHelpfull: Yes(4) No(1)
• ans is same as Vicky anand but 105/4 s not equal to 50 so i think answer is cannot be determined
• 10 years agoHelpfull: Yes(1) No(7)
• if 2 terms are removed then n= n-2
  mean (n-2+1)/2
  (n-1)/2=105/4
  n=107/2 =53.5
  
  but one thing more we dont know from which place the values are removed so we cant take mean as last them + first term / two
  so its can not be determined
  
• 10 years agoHelpfull: Yes(1) No(0)