An employee has $4000 of salary tax free The next $1500 is taxed at 10% The next $28000 is taxed at 22% Any further amount is taxed at 40% Which of these groups of numbers would fall into the same equivalence class?

  1. $5800; $28000; $32000

  2. $0; $200; $4200

  3. $5200; $5500; $28000

  4. $28001; $32000; $35000


Correct Option: A

AI Explanation

To determine which group of numbers falls into the same equivalence class, we need to calculate the tax amount for each salary and compare the results.

Let's go through each option:

Option A: $5800; $28000; $32000

  • For the first $4000, there is no tax.
  • The next $1500 is taxed at 10%, which amounts to $150.
  • The next $28000 is taxed at 22%, which amounts to $6160.
  • The total tax is $150 + $6160 = $6310.

Option B: $0; $200; $4200

  • For the first $4000, there is no tax.
  • The total tax is $0.

Option C: $5200; $5500; $28000

  • For the first $4000, there is no tax.
  • The next $1500 is taxed at 10%, which amounts to $150.
  • The total tax is $150.

Option D: $28001; $32000; $35000

  • For the first $4000, there is no tax.
  • The next $1500 is taxed at 10%, which amounts to $150.
  • The next $28000 is taxed at 22%, which amounts to $6160.
  • The total tax is $150 + $6160 = $6310.

Based on these calculations, we can see that Option A and Option D have the same total tax amount of $6310. Therefore, the correct answer is Option A.

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