How many rectangles are there?

8 (read below)

Step-by-step explanation:

There is 8 if you re counting the bottom, light turqoise one. If not, then 7.

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0