\( \frac{10!}{7!}-\frac{9!}{6!} \) का मान क्या है?
What is the value of \( \frac{10!}{7!}-\frac{9!}{6!} \)?
Explanation opens after your attempt
B. (288)
Concept
The first value is \(10\cdot9\cdot8=720\) and the second is \(9\cdot8\cdot7=504\), so (720-504=216). Check subtraction carefully after expansion.
Why this answer is correct
The correct answer is B. (288). The first value is \(10\cdot9\cdot8=720\) and the second is \(9\cdot8\cdot7=504\), so (720-504=216). Check subtraction carefully after expansion.
Exam Tip
पहला मान \(10\cdot9\cdot8=720\) और दूसरा \(9\cdot8\cdot7=504\), अंतर (216) नहीं बल्कि (216) होगा; सही गणना से (720-504=216) है।
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