dmoulthrop2089 dmoulthrop2089

16-12-2019
Mathematics

contestada

If X and Y are random variables with E(X) = 6 and E(Y) = 9, then E(2X + 3Y) is:
-39-15-27-12

Respuesta :

LammettHash LammettHash

16-12-2019

Expectation is linear in the sense that

[tex]E[2X+3Y]=E[2X]+E[3Y]=2E[X]+3E[Y][/tex]

so that

[tex]E[2X+3Y]=2\cdot6+3\cdots9=12+27=\boxed{39}[/tex]

Answer Link

Otras preguntas

In 1855, Italian governments were controlled by ethier ______ or the papacy. A) Austria B) Italy C) Germany D) Spain

why were President Wilson's Fourteen Points not incorporated in the Treaty of Versailles?

Which word in the sentence is the participle? My dog, a restless beagle, barked at the sleeping cat. A. barked B. beagle C. restless D. sleeping

Which of the following groups was 'highest' in terms of social status? peninsulares mulattos mestizos The term for fighting that is characterized by small group

Each of four friends orders a sweatshirt from a catalog. There are 15 colors of sweatshirts, 5 of which are all cotton and 10 of which are a blend. Each one or

Which sentence does not contain any errors in comma usage? A. The playful curious, baby seal swam toward the tourists. B. Please don't touch that sharp, rusty n

(X-2)²+(y-1)²=25 how do you do this problem?

The magna carta was the first step toward England's?

what are 5 unique beliefs or practices that Buddhists bring into their daily life.

Which form of government practiced in certain greek-city states describes a system of shared rule by a group of elite wealthy leaders?