Answer:
5 1/3
Step-by-step explanation:
To add the mixed numbers, we need to transform them into fractions, so 3 2/3 and 1 2/3 are equivalent to:

Then, since the fractions have the same denominator, we can add the fraction as:

Now, 16/3 as a mixed number is equal to:

Because when we divide 16 by 3, we get 5 as a quotient and 1 as a remainder.
Therefore, the answer is 5 1/3