the center square is 20 x 20 = 400
there are 4 12 x 20 areas
12*20 = 240*4 = 960
960+400 = 1360 square inches
= -1/9 im pretty sure is the answer
P(red) 4/9 on the first pull, P(red) 3/8 on the second pull
(4/9)(3/8) = 12/72 = 1/6 Letter D
(a) If
are mutually exclusive, then

so we have

(b) If
are mutually independent, then




so that



The answer should be 26 hours