Correct Answer - Option 3 : 512
Given:
If number of child half then number of notebooks have each child = 16
Formula used:
If a : b :: c : d
then a × d = b × c
Calculation:
Let the number of children of the class be x
Then, number of notebooks each child will get = x/8
If the number of children were x/2
Number of notebooks each child will get = 16
Now, According to the question
Total number of notebook is constant
So, (x/2) × 16 = x × (x/8)
⇒ x = 64
So, total number of notebooks = 64 × 8
⇒ 512
∴ Total number of notebooks were distributed is 512.