MHT CET · Maths · Permutation Combination
4 red balls and 5 green balls are selected from n balls. If the sum of both the selections is greater then \({ }^{n+1} C_4\) then the value of \(n\) is equal to
- A \(n>8\)
- B \(\mathrm{n} < 8\)
- C \(n>10\)
- D \(n>12\)
Answer & Solution
Correct Answer
(A) \(n>8\)
Step-by-step Solution
Detailed explanation
\( {}^n C_4 + {}^n C_5 > {}^{n+1} C_4 \) \( {}^{n+1} C_5 > {}^{n+1} C_4 \)
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