Subject: mathqa
Question: each of 3 investments has a 20 % of becoming worthless within a year of purchase , independently of what happens to the other two investments . if simone invests an equal sum k in each of these 3 investments on january 1 , the approximate chance that by the end of the year , she loses no more than 1 / 3 of her original investment is
Option: 
A: 80 %
B: 90 %
C: 70 %
D: 40 %
Answer: B