एक विद्यार्थी ने (1) से (175) तक संख्याएं जोड़ीं और फिर (1) से (125) तक का योग घटाया। परिणाम क्या होगा?
A student added numbers from (1) to (175) and then subtracted the sum from (1) to (125). What will be the result?
Explanation opens after your attempt
C. (7525)
Concept
The result is \(S_{175}-S_{125}=15400-7875=7525\). This is the sum from (126) to (175).
Why this answer is correct
The correct answer is C. (7525). The result is \(S_{175}-S_{125}=15400-7875=7525\). This is the sum from (126) to (175).
Exam Tip
परिणाम \(S_{175}-S_{125}=15400-7875=7525\) है। यह (126) से (175) तक का योग है।
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