(5) गणित और (4) भौतिकी पुस्तकों में से (5) पुस्तकें चुननी हैं, जिनमें ठीक (2) भौतिकी पुस्तकें हों। कितने चयन हैं?

From (5) mathematics and (4) physics books, (5) books are to be selected with exactly (2) physics books. How many selections are there?

Explanation opens after your attempt
Correct Answer

B. (60)

Step 1

Concept

For exactly (2) physics books use \(^{4}C_{2}\), and for (3) mathematics books use \(^{5}C_{3}\). Product is (60).

Step 2

Why this answer is correct

The correct answer is B. (60). For exactly (2) physics books use \(^{4}C_{2}\), and for (3) mathematics books use \(^{5}C_{3}\). Product is (60).

Step 3

Exam Tip

ठीक (2) भौतिकी के लिए \(^{4}C_{2}\) और (3) गणित के लिए \(^{5}C_{3}\)। गुणन से (60) मिलता है।

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Mathematics Answer, Explanation and Revision Hints

(5) गणित और (4) भौतिकी पुस्तकों में से (5) पुस्तकें चुननी हैं, जिनमें ठीक (2) भौतिकी पुस्तकें हों। कितने चयन हैं? / From (5) mathematics and (4) physics books, (5) books are to be selected with exactly (2) physics books. How many selections are there?

Correct Answer: B. (60). Explanation: ठीक (2) भौतिकी के लिए \(^{4}C_{2}\) और (3) गणित के लिए \(^{5}C_{3}\)। गुणन से (60) मिलता है। / For exactly (2) physics books use \(^{4}C_{2}\), and for (3) mathematics books use \(^{5}C_{3}\). Product is (60).

Which concept should I revise for this Mathematics MCQ?

For exactly (2) physics books use \(^{4}C_{2}\), and for (3) mathematics books use \(^{5}C_{3}\). Product is (60).

What exam hint can help solve this Mathematics question?

ठीक (2) भौतिकी के लिए \(^{4}C_{2}\) और (3) गणित के लिए \(^{5}C_{3}\)। गुणन से (60) मिलता है।