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द्विपद बंटन ज्ञात करो जिसका माध्य 5 तथा प्रसरण 2.5 है |

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द्विपद बंटन ज्ञात करो जिसका माध्य 5 तथा प्रसरण 2.5 है |
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Correct Answer - `""^(27)C_(r)((1)/(3))^(r )((2)/(3))^(27-r), r=0,1,2,…,27`
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