Correct Answer - Option 2 : 59
Given
The average weight of 5 types of biscuits = 65 gm
Formula Used
Average = Sum of observation/Number of observation
Calculation
Let the weight of 3rd type of biscuit be x
⇒ according to the question
⇒ (total weight of 1st 3 types of biscuits) + (total weight of last 3 types of biscuits) - x = sum of all types
⇒ 60 × 3 + 68 × (3 - x) = 65 × 5
⇒ x = 59 gm
∴ the weight of 3rd type of biscuits is 59 gm