Find the Indicated Probability $\frac { 3 } { 4 }$

Find the indicated probability. Round your answer to 6 decimal places when necessary.
-Find the probability of correctly answering the first 3 questions on a multiple choice test if random guesses are made and each question has 4 possible answers.

A) $\frac { 3 } { 4 }$
B) $\frac { 1 } { 81 }$
C) $\frac { 4 } { 3 }$
D) $\frac { 1 } { 64 }$