TS EAMCET · Maths · Binomial Theorem
If then
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
Pr+122: Pr+220=11: 52 Apply the formula Pnr=n!n-r! ⇒22!(22-r-1)!20!(22-r-2)!=1152 ⇒22!×(18-r)!20!×21-r!=1152 ⇒22×21×20!×(18-r)!20!×21-r×20-r×19-r×18-r!=1152 ⇒22×2121-r×20-r×19-r=1152…
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