please The monthly volume of book sales tromp the online sit

please

The monthly volume of book sales tromp the online site of a bookstore is categorized as below expectations (0), in line with expectations (1), or above expectations (2). Hie monthly volume of book sales from the brick and mortar counterpart of the bookstore is categorized similarly. The following table gives the probabilities of the nine possible outcomes of an experiment that records the monthly volume of sales categories. Find the probabilities ol each of the following events. E1 = the online sales volume category is 1.E2 = the brick and mortar sales volume category is E3 = E1 , E2.

Solution

a)

i)

P(0) + P(1) = 0.10+0.04+0.02   +   0.08+0.30+0.06 = 0.6

ii)

P(0) + P(1) = 0.10 + 0.08 + 0.06 + 0.04+0.30+0.14 = 0.72

iii)

0.10 +   0.30   = 0.40

P(0) = 0.10 +0.04 +0.02= 0.16

P(1) = 0.08 +0.30 +0.06= 0.44

P(2) = 0.06 + 0.14 + 0.20= 0.4