Question 930276
p(boy LH) = .14, p(girl LH) = .08
1000 students: 650G, 350B
.......
.14(650) + .08(350) = 91 LH
Group:  91/1000 = .091 LH,   .909(not LH)  {{{1-.091}}}
choose 2
............
P(at least one is left handed) = 1 - P(none) = 1 - (.909)^2 = .1737  0r 17.37%