एक विद्यालय में (120) विद्यार्थियों में (68) ने (A), (57) ने (B), और (31) ने दोनों चुने। कम से कम एक चुनने वालों का प्रतिशत कितना है?

In a school of (120) students, (68) chose (A), (57) chose (B), and (31) chose both. What is the percentage choosing at least one?

Explanation opens after your attempt
Correct Answer

A. (78.33%)

Step 1

Concept

At least one is (68+57-31=94), so the percentage is \(\frac{94}{120}\times100=78.33%\). Find the count first, then convert to percentage.

Step 2

Why this answer is correct

The correct answer is A. (78.33%). At least one is (68+57-31=94), so the percentage is \(\frac{94}{120}\times100=78.33%\). Find the count first, then convert to percentage.

Step 3

Exam Tip

कम से कम एक (=68+57-31=94), इसलिए प्रतिशत \(\frac{94}{120}\times100=78.33%\) है। पहले संख्या निकालें फिर प्रतिशत लें।

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एक विद्यालय में (120) विद्यार्थियों में (68) ने (A), (57) ने (B), और (31) ने दोनों चुने। कम से कम एक चुनने वालों का प्रतिशत कितना है? / In a school of (120) students, (68) chose (A), (57) chose (B), and (31) chose both. What is the percentage choosing at least one?

Correct Answer: A. (78.33%). Explanation: कम से कम एक (=68+57-31=94), इसलिए प्रतिशत \(\frac{94}{120}\times100=78.33%\) है। पहले संख्या निकालें फिर प्रतिशत लें। / At least one is (68+57-31=94), so the percentage is \(\frac{94}{120}\times100=78.33%\). Find the count first, then convert to percentage.

Which concept should I revise for this Mathematics MCQ?

At least one is (68+57-31=94), so the percentage is \(\frac{94}{120}\times100=78.33%\). Find the count first, then convert to percentage.

What exam hint can help solve this Mathematics question?

कम से कम एक (=68+57-31=94), इसलिए प्रतिशत \(\frac{94}{120}\times100=78.33%\) है। पहले संख्या निकालें फिर प्रतिशत लें।