The probability that a visitor at the mall buys a pack of candy is 10%. If three visitors come to the mall today, what is the probability that exactly two will buy a pack of candy? Choose the correct answer:
A) 0.009
B) 0.015
C) 0.027
D) 0.036
E) 0.054
One case is: candy - candy - no candy   The probability is 1/10*1/10*9/10 = 9/1000   There are 3 such cases, so we should multiply this probability by 3.   P(exactly 2 buy candy) = 9/1000 * 3 = 27/1000= 
<gadget id="calculator">27/1000</gadget>
<output>27/1_000 = around 0.027</output>
0.027   The answer is 0.027.
<result>C</result>
The probability that a visitor at the mall buys a pack of candy is 10%. If three visitors come to the mall today, what is the probability that exactly two will buy a pack of candy?