Question 592084
y agree and x disagree
x=.1 and y=.9
(x+y)^7 This is a binomial expansion.
7C2*x^2y^5 + 7C3*x^3y^4 
=21*.01*.5905 + 35*.001*.6561
=.1240+.0230
=.1570 
1-.1570=.843 the probability that either two or three will agree with the statement that their generation will be remembered for their social concerns.
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I did this backwards because the question was confusing but the answer is correct.   
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Ed