首页
随机变量ξ~B(20,),当P(ξ=k)取最大值时,k=A.B.13C.14D.13或14
试题详情
随机变量ξ~B(20,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAMRJREFU
OE+9k9kNxDAIRNmWaYdOXAdV0AQxPgjYKyvSRmspH044HsPko/XA6VjA6cCzACZr0x8sKiELVIoi
8XjFShbk98onzClDCqYqO4O1ixVWSCbQ8F1zhcTTU0OAaEHSiTsrewATaonzjYgWYOSxr1bQeQeD
cpGmWHC3eij1YSEvVNgBb+hFqO8gLzC0wrakKVKStC2rusht1h2V1y2SHHX2w+KmNKYvbWcI8w9Y
DMbYdPjV1ebLdcz42y0a/HVZB09eQKDSoCwsRLgAAAAASUVORK5CYII=
)
),当P(ξ=k)取最大值时,k=( )
A.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAAjCAYAAABLuFAHAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQ9JREFU
SEu9Ve0VwyAIpCu7Dps4h1O4BAXURNRqtH3lvfyI5Dw+DvIiNjg1AZ8anAI1YguO5B0Qhvo0nXFm
BM5TrFwGHL3Tj2pwQCDnE0T9lfMGR0/oQ8McCMFRxjLcvmcwh4YSUhN2wCZU61dwwHK7dWqYJs/k
L2kAI6scN8FSEK1k8+jtT8K+q9/kzEV0gFymYsOCFWff52etSp08F8muVH+p7T3u75hHPX5yNhjJ
f4a9x2W/7gumksxatyul42nArN1rBEXH7UqaMUdZB7eJrmfkn/ss47gXdmK9ZvwEnFelFq6snFFX
pvLsd9iqVbV/kfeEebQYZszCVC3CRb3af9WeWL+b5z2unWovbn4DPXE6PaSkvmUAAAAASUVORK5C
YII=
)
B.13
C.14
D.13或14
相关试题
-
随机变量ξ~B(20,
),当P(ξ=k)取最大值时,k=( )
A.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAA8AAAAjCAYAAABLuFAHAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAgY0hSTQAAeiYAAICEAAD6AAAAgOgAAHUwAADqYAAAOpgAABdwnLpRPAAAAQ9JREFU
SEu9Ve0VwyAIpCu7Dps4h1O4BAXURNRqtH3lvfyI5Dw+DvIiNjg1AZ8anAI1YguO5B0Qhvo0nXFm
BM5TrFwGHL3Tj2pwQCDnE0T9lfMGR0/oQ8McCMFRxjLcvmcwh4YSUhN2wCZU61dwwHK7dWqYJs/k
L2kAI6scN8FSEK1k8+jtT8K+q9/kzEV0gFymYsOCFWff52etSp08F8muVH+p7T3u75hHPX5yNhjJ
f4a9x2W/7gumksxatyul42nArN1rBEXH7UqaMUdZB7eJrmfkn/ss47gXdmK9ZvwEnFelFq6snFFX
pvLsd9iqVbV/kfeEebQYZszCVC3CRb3af9WeWL+b5z2unWovbn4DPXE6PaSkvmUAAAAASUVORK5C
YII=
)
B.13
C.14
D.13或14
-
设变量x,y满足约束条件
,则目标函数z=2x+y的最大值为( )
A.8
B.13
C.14
D.10
-
已知{an}为无穷等差数列,若
取得最大负值时,n=( )
A.12
B.13
C.14
D.15
-
已知{an}为无穷等差数列,若
取得最大负值时,n=( )
A.12
B.13
C.14
D.15
-
已知{an}为无穷等差数列,若
取得最大负值时,n=( )
A.12
B.13
C.14
D.15
-
已知等差数列40,37,34,…前n项和为Sn,则使Sn最大的正整数n=( )
A.12
B.13
C.14
D.15
-
若果执行右面的程序框图,那么输出的i=( )
![](https://img.xintiku.com/upload/83/55/8355d954ead1931c2965d008a1978991.png)
A.12
B.13
C.14
D.15
-
已知数列3,9,15,…,3(2n-1),…那么81是它的第几项( )
A.12
B.13
C.14
D.15
-
已知Cn+17-Cn7=Cn8,那么n的值是( )
A.12
B.13
C.14
D.15
-
若等差数列{an}的前5项和S5=25,且a2=3,则a7=( )
A.12
B.13
C.14
D.15