What do you mean? whats the question?
Total marbles = 40 & 1/4 (or 0.25) are, then RED = 40x 0.25 = 10
If RED = 10 then BLUE = 30
P(picking one blue) = 30/40 = 3/4 =0.75
Answer:

Step-by-step explanation:
Given

Required
The exponent form
We have:

Apply the following law of indices;

So, the expression becomes:
