Answer:
Option (a) is correct.
n + 3 represents the given expression "the sum of 3 and n" correctly.
Explanation:
Given : Expression "the sum of 3 and n"
We have to choose the correct option from the given options that represents the given expression "the sum of 3 and n" correctly.
Consider the given expression "the sum of 3 and n"
We know the mathematical symbol for sum is '+'
So, The sum of 3 and n is written mathematically as 3 + n
Thus, n + 3 represents the given expression "the sum of 3 and n" correctly.