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Question Medium Mathematics Arithmetic Progressions (AP) Finding the $n$th term of an AP Class 10 Level 65

एक मोबाइल प्लान में पहले महीने शुल्क (₹900) है और हर महीने (₹35) की छूट बढ़ती है। (10)वें महीने का शुल्क क्या होगा?

In a mobile plan, the fee in the first month is (₹900) and the discount increases by (₹35) each month. What is the fee in the (10)th month?

Explanation opens after your attempt
Correct Answer

C. (₹585)

Step 1

Concept

The fee is decreasing so (d=-35). (a_{10}=900+9(-35)=585).

Step 2

Why this answer is correct

The correct answer is C. (₹585). The fee is decreasing so (d=-35). (a_{10}=900+9(-35)=585).

Step 3

Exam Tip

शुल्क घट रहा है इसलिए (d=-35)। (a_{10}=900+9(-35)=585)।

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