It would really depend on the question that is being asked.
If the question is simply asking, What is “Net” Accounts Receivables? Then all you need to answer the question is below which gives you the answer of NET AR = $190,000:
Current AR: $200,000
Less Allowance for Uncollectibles: ($10,000) = 200,000 – (200,000 x 5%)
Equals Net AR: $190,000
There are a lot of ways to ask a question on this and the exam will ask it in many different ways, so you need to understand the journal entry. The journal entry would be the below because the balance in the Allowance for Uncollectibles account is $3,000 and it is calculated above to be $10,000. Therefore, the Allowance for Uncollectibles needs to be adjusted by $7,000.
Debit Bad Debt Expense $7,000
Credit Allowance for Uncollectibles $7,000 ($10,000 – $3,000)
Another important thing to keep in mind is that the Allowance for Uncollectibles is typically a credit balance because by nature it is a contra-asset account. If not mentioned in the question, then assume it is a credit balance. However, make sure that the question does not state that there is a debit balance in the allowance account because the exam questions will sometimes include that to try and trip you up to make sure that you are paying attention to the details.