A saves 20% of his monthly salary. If his monthly expenditure is ₹ 6000, what is his monthly saving?

Introduction / Context:
Let total salary be S. If 20% is saved, then 80% is spent. Given the expenditure, we can find S and then the saving (20% of S). This is a standard split between savings and expenses.

Given Data / Assumptions:

• Savings rate = 20% of salary.
• Expenditure = ₹ 6000 = 80% of salary.

Concept / Approach:
Expenditure = 0.80 * S ⇒ S = Expenditure / 0.80. Once S is known, Saving = 0.20 * S. Avoid mixing rupees with percentages directly; use decimal multipliers.

Step-by-Step Solution:
S = 6000 / 0.80 = 7500Saving = 0.20 * 7500 = 1500

Verification / Alternative check:
Check: Saving 1500 plus expenditure 6000 equals 7500, which matches the computed salary.

Why Other Options Are Wrong:
₹ 1200 and ₹ 1000 underestimate the saving; ₹ 1800 overestimates it; ₹ 4800 is actually the remaining amount after a mistaken 20% spend assumption.

Common Pitfalls:
Taking 20% of ₹ 6000 instead of 20% of the total salary. Expenditure is 80% of salary, not the base for savings percent.

Final Answer:
₹ 1500