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ID#4960 BCS General Math Preli (47)

যদি $^{n}C_{12} = ^{n}C_{8}$ হয়, তবে $^{22}C_{n}$ এর মান কত?
ক) 230
খ) 231
গ) 232
ঘ) 233

ব্যাখ্যা

আমরা জানি, $^{n}C_{x} = ^{n}C_{y}$ হলে, $n = x + y$
$\therefore n = 12 + 8 = 20$

$^{22}C_{n} = ^{22}C_{20}$
$= \frac{22 \times 21}{2 \times 1}$
$11 \times 21$
= 231
Resource Details
Exam BCS
Subject General Math
Chapter 19
Year 47

Discussion — BCS General Math Preli (47)

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