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A class is made up of 10 boys and 2 girls. Half of the boys wear glasses. A student is selected at random from the class. What is the probability that the student is a boy with glasses?

My Question is, I don't know how to do Probability.

  • Math -

    in general,
    the probability of "some event"
    = no of cases for that event/total number of cases

    so in our case, there would be 5 boys with glasses, the "event"
    the total number of students = 12

    so the prob(boy with glasses) = 5/12

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