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Suppose the tree diagram below represents all the students in a high school and that one of these
students were chosen at random. If the student is known to be a girl, what is the probability that
the student is left-handed?
Solution
there are 300 girl
Out of these 300 girls 50 are left and 250 are right handed girls
Now, P( student is left handed, given we know that it' a girl)
= no. of girls who is left handed/ total girls
= 50/300
= .167

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Suppose the tree diagram below represents all the students in a high .pdf

  • 1. Suppose the tree diagram below represents all the students in a high school and that one of these students were chosen at random. If the student is known to be a girl, what is the probability that the student is left-handed? Solution there are 300 girl Out of these 300 girls 50 are left and 250 are right handed girls Now, P( student is left handed, given we know that it' a girl) = no. of girls who is left handed/ total girls = 50/300 = .167