Answer:
[tex]\frac{3}{4}[/tex]
Step-by-step explanation:
We need to find the fractional amount of the total that is 2d and 4d size nails.
It is given 2d nails are 2/4th of the total. Also
It is given 4d nails are 1/4th of the total.
Hence 2d and 4d comprises of 2/4 + 1/4 = 3/4th of the total
so, 2d and 4d is 3/4th of the total