SOLUTION: in the class of 20 children , 4 of the 9 boys and 3 of the 11 girls are in the athletics team. a person from the class is chosen to be in the "egg and spoon" race on sports day. fi

Algebra ->  Probability-and-statistics -> SOLUTION: in the class of 20 children , 4 of the 9 boys and 3 of the 11 girls are in the athletics team. a person from the class is chosen to be in the "egg and spoon" race on sports day. fi      Log On


   

Question 1145322: in the class of 20 children , 4 of the 9 boys and 3 of the 11 girls are in the athletics team. a person from the class is chosen to be in the "egg and spoon" race on sports day. find the probability that the person chosen is
(a) in the athletics team
(b) a female
(c) a female member of the athletics team
(d) a female or in the athletics team
Answer by rothauserc(4718) About Me  (Show Source):
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(a) (4+3)/20 = 7/20
:
(b) 11/20
:
(c) 3/20
:
(d) (11+7-3)/20 = 15/20 = 3/4
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