CBSE Class 11-science Answered
Evaluate
, when n = 10 and r = 4.
![](http://images.topperlearning.com/topper/questions/9540_image006.gif)
Asked by Topperlearning User | 04 Jun, 2014, 13:23: PM
Answered by | 04 Jun, 2014, 15:23: PM
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