Each of three 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 in each of these three 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 Choose the correct choice from the following answers.
A) 90%	B) 80%	C) 70%	D) 60%	E) 40%
Since amount invested is same for all 3 , and probability of investment turning worthless is 20%, the required probability is   80%×80%×80% + 20%×80%×80×\frac{3!}{2!}   =89.6%   90%nswer 90%
<result>A</result>
Each of three 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 in each of these three 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