mathematics

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in a class of 60 boys and 40 girls, it is observed tha 24 boys and 21 girls wear glasses. what is the probability that: (1)A student is picked at random from this calss wear glasses (2)A girl picked at random does not wear glsses.(3)A boy pivked at random wear glsses.(4)A student picked at random either a boy who wear glasses or a girl who does not wear glasses

  • mathematics -

    boys wearing glasses = 24
    boys not wearing glasses = 36
    girls wearing glasses = 21
    girls not wearing glasses = 19

    1) prob(a student wears glasses) = 45/100= 9/20

    2) 19/40

    3) ...

    can you see what I am doing?
    take over

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