If Laspeyre's index number is 169 and Paasche's index number is 81, then Fisher's ideal index number is :
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → 117
$\text{Fisher's ideal Index} = \left(\sqrt{(\text{Laspeyre's Index})×(\text{Paasche's Index})}\right)$
$=\sqrt{169×81}$
$=\sqrt{13689}$
$=117$