যদি nC12 = nC8 হয়, তবে 22Cn এর মান কত?
Solution
Correct Answer: Option B
দেওয়া আছে,
nC12 = nC8
⇒ nCn - 12 = nC8
⇒ n - 12 = 8
∴ n = 12 + 8 = 20
সুতরাং, প্রদত্ত রাশি,
= 22Cn
= 22C20 ; [n = 20]
= 22!/(20! × 2!)
= (22 × 21 × 20!)/(20! × 2)
= 11 × 21
= 231
nC12 = nC8
⇒ nCn - 12 = nC8
⇒ n - 12 = 8
∴ n = 12 + 8 = 20
সুতরাং, প্রদত্ত রাশি,
= 22Cn
= 22C20 ; [n = 20]
= 22!/(20! × 2!)
= (22 × 21 × 20!)/(20! × 2)
= 11 × 21
= 231
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