SOLUTION: the probability that a boy is left handed is 0.14 and the probabilit a girl is is 0.08. In a shool of 1000 students there are 650 girls and 350 boys. If 2 students are selected fi

Question 930276: the probability that a boy is left handed is 0.14 and the probabilit a girl is is 0.08. In a shool of 1000 students there are 650 girls and 350 boys.
If 2 students are selected fin the probability that at least one is left handed.
I really need help with the method and aswering of this question because i doont understand it. i would reallly nee your help. thankyou in advance. I wold like an answer as soon as possible.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
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)
choose 2
............
P(at least one is left handed) = 1 - P(none) = 1 - (.909)^2 = .1737 0r 17.37%
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