JEE Mains · Maths · STD 11 - 6. permutation and combination
The number of sequences of ten terms, whose terms are either 0 or 1 or 2 , that contain exactly five 1 s and exactly three 2 s , is equal to
- A 360
- B 45
- C 2520
- D 1820
Answer & Solution
Correct Answer
(C) 2520
Step-by-step Solution
Detailed explanation
11111 222 00 No. of sequences \(=\frac{10!}{5!3!2!}=2520\) Note : Sequence can start with 0.
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