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*当X服从参数为n，p的二项分布时，P（X＝k）＝（ ）
·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20151127/1448627504884020406_blob.png"" 9639477864219018"" blob.png"">
·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20151127/1448627511462017125_blob.png"" 24761497646160847"" blob.png"">
·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20151127/1448627522413073475_blob.png"" 5187654231601791"" blob.png"">
·<img src=""https://s3.cn-north-1.amazonaws.com.cn/qingshuxuetang/ueditor/jsp/upload/image/20151127/1448627527346000976_blob.png"" 775942392776153"" blob.png"">"

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出自：佳木斯大学语言治疗学

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