A randomly selected sample population consists of 60% women and 40% men. 90% of the women and 15% of the men are colorblind. For a certain experiment, scientists will select one person at a time until they have a colorblind subject. What is the approximate probability of selecting a colorblind person in no more than three tries?  Choose the most appropriate option:	A) 95%	B) 90%	C) 80%	D) 75%	E) 60%
According to the matrix the probability of selecting a colorblind person is 0.6 and the probability of NOT selecting a colorblind person is 0.4.   {The probability of selecting a colorblind person in three tries} = 1 - {the probability of NOT selecting a colorblind person in three tries} = 1 - 0.4*0.4*0.4 = 1 - 0.064= 
<gadget id="calculator">1 - 0.064</gadget>
<output>0.936</output>
0.936= 93.6%.   We are asked to find the approximate probability, so the answer is 95%.   95%nswer: 95%.
<result>A</result>
A randomly selected sample population consists of 60% women and 40% men. 90% of the women and 15% of the men are colorblind. For a certain experiment, scientists will select one person at a time until they have a colorblind subject. What is the approximate probability of selecting a colorblind person in no more than three tries?