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Please solve the following question: The sum 20 C 0 + 20 C 1 + 20 C 2 + …. + 20 C 10 is:
Please solve the following question: The sum 20C0 + 20C1 + 20C2 + …. + 20C10 is:

```
3 years ago

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137 Points
```							As we know that nC0+ nC1+.....+nCn=2^n,  and nCr=nC(n-r), so by this formula we can easily write        2[20C0+20C1+....+20C9] +20C10= 2^20 so By this u can easily calculate the value and it comes out to be 2^19+ [(20C10)/2] and its value is 616666
```
3 years ago
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• 101 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions