Explanation: Average of Arif & Babu's salary=10,000 Taka. So, total salary = \(2 \times 10000\) taka = 20,000 taka. Again, Sabbir and babu's total salary= 24,000 taka. The difference between sabbir's salary and Arif's salary = sabbir's salary- arif's salary = (Sabbir and Babu's salary) - (Arif and babu's salary) = \(24000-20000 = 4000\) Taka.
