(文科)设随机变量X的分布列为P(X=i)=i2a,i=1,2,3,则P(X=2)=()A.19B.16C.13D.14-数学

题目简介

(文科)设随机变量X的分布列为P(X=i)=i2a,i=1,2,3,则P(X=2)=()A.19B.16C.13D.14-数学

题目详情

(文科)设随机变量X的分布列为P(X=i)=http://www.mofangge.com/html/qDetail/02/g0/201310/data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGYAAAAkCAYAAAB7T08FAAAA+0lEQVRoge2YQQ6FIAwFPcZfAve/1z+GrkhcEAuFQtGZhIUJtJUnbfE4AAAAAEqklM7VMQAAKEkpnXmsjgUKIIxTEMYpCOMUhHHGvfjTBAAANKFNmaNTrUUK/1RZsNrAp2cvNpdSakJKL/U6YWKM/97RG3QOtOfLt/wCLdKZODGE8Osdo4LOgc9c9za7ZpSO/OxUZmlzhm3Rsca5xYnRxCLNb7XppvjvLEzNJm4rTKtz7S+g2nUWsWhOobrBGXUv8FTcdqs/ojNvHZKG7UUpOfS0wXDjqXVdFdPnkU4P4iygpvVEmMlIotTMg8E8pStS2UKki5X2EggAYMMFXyXoGN1FW8UAAAAASUVORK5CYII=,则P(X=2)=(  )
A.https://img.360youke.com/images/upload/03/2145/11264932snjywgwywsh.pngB.C.D.
题型:单选题难度:中档来源:不详

答案

C

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