According to IDC Samsung controls 20 of the smartphone mark

According to IDC, Samsung controls 20 % of the smartphone market. A random sample of three was selected. Determine the probability that the first two phones are Samsung and the third phone is not.
a. 0.22
b. 0.038
c. 0.044
d. 0.053
e. 0.032

Solution

Here,

P(Samsung) = 0.20
P(not samsung) = 1 - 0.20 = 0.80

Thus,

P(samsung, samsung, not samsung) = 0.20*0.20*0.80 = 0.032 [ANSWER, E]