TS EAMCET · Maths · Permutation Combination
If \({ }^n P_r=30240\) and \({ }^n C_r=252\), then the ordered pair \((n, r)\) is equal to
- A \((12,6)\)
- B \((10,5)\)
- C \((9,4)\)
- D \((16,7)\)
Answer & Solution
Correct Answer
(B) \((10,5)\)
Step-by-step Solution
Detailed explanation
Given that, \({ }^n P_r=30240\) and \({ }^n C_r=252\)…
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