Place Value Exercise: Finding Numbers with 3 in Tens Position

To determine which numbers have `3` as their tens digit, we need to analyze each option:

• Option (a): $330$

The number 330 has digits arranged as follows: the hundreds digit is $3$, the tens digit is $3$, and the units digit is $0$. Thus, the tens digit is $3$.

• Option (b): $131$

The number 131 has digits arranged as follows: the hundreds digit is $1$, the tens digit is $3$, and the units digit is $1$. Thus, the tens digit is $3$.

• Option (c): $303$

The number 303 has digits arranged as follows: the hundreds digit is $3$, the tens digit is $0$, and the units digit is $3$. Here, the tens digit is $0$, not $3$.

• Option (d): Answers (a) and (b) are correct

Since options (a) and (b) both meet the criteria of having `3` as their tens digit, option (d) is correct.

Therefore, the correct answer is Answers (a) and (b) are correct.