A paint supply store has a certain type of paint in stock. It sells the paint to a customer in lots represented by X. Suppose X has the following distribution:

x 1 2 3 4
p(x 0.2 0.4 0.3 0.1

Compute the expected number of lots sold to a random customer.
A. 10
B. 2.5
C. 2.3
D. 0.5

Question

A paint supply store has a certain type of paint in stock. It sells the paint to a customer in lots represented by X. Suppose X has the following distribution:

x          1       2      3        4
p(x     0.2    0.4   0.3     0.1


Compute the expected number of lots sold to a random customer.
	A.	10
	B.	2.5
	C.	2.3
	D.	0.5

anonymous · Answer

I got A for this one,  @agent0smith

agent0smith · Answer

x          1       2      3        4
p(x     0.2    0.4   0.3     0.1

like the last one, find the expected value by multiplying each x by it's probability

1*0.2 + 2*0.4 + 3*0.3 + 4*0.1

anonymous · Answer

ohhhh 2.3! lol i had doubts about this question lol