皮皮学，免费搜题
登录
搜题
【单选题】
设随机变量X在区间(0，1)上服从均匀分布，在X = x（0 < x < 1）的条件下，随机变量Y在区间(0 , x)上服从均匀分布，设随机变量X和Y的联合概率密度f (x,y)，则f (1/2 , 1/3) = （ ）.A.
1
B.
2
C.
1/2
D.
1/6
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】连词成句。 1. waiter, a, in, a, restaurant, works (.) ______________________________________________________ 2. have, a, trunk, camel, does, a (?) ______________________________________________________ 3. ...
【单选题】Why do Karl and Ann choose this restaurant ?
A.
Because this restaurant is luxurious and beautiful.
B.
Because this restaurant is close to their company.
C.
Because this restaurant is not expensive and the food is good.
D.
Because this restaurant is very famous for hamburgers .
【简答题】A man walked into a restaurant. The restaurant advertised it had the 1 menu in the world. The manager was very proud of being able to provide any dish, no matter how 2 it was. At the bottom of the 3 ,...
【单选题】某除尘系统采用袋式除尘器,已知袋式除尘器入口工况风量1200000m3/h(100°C),过滤风速为1.5m/min,滤袋规格(直径×长度)为320mm×9000mm,试计算最少需要( )条滤袋?
A.
83
B.
1474
C.
4976
D.
4630
【单选题】Which of the following is not a newly sprung-up restaurant?
A.
cosplay restaurant
B.
body Suchi
C.
drive-in restaurant
D.
hot-pot restaurant
相关题目：