Math

posted by .

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

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Maths

    There are 36 pupils in a class. Each girl is given 8 books and each boy is given 3 books. The total number of books the girls receive is 46 more than the total number of books the boys receive. How many girls are there in the class?
  2. math

    In a certain high school class, consisting of 60 girls and 40 boys, it is observed that 24 girls and 16 boys wear eye glasses, if a student is picked at random from this class. What is the probability that student picked at random …
  3. maths

    in a class there are 50 students,15 girls wear glasses 8 do not wear glasses.20 boys don't wear glasses.how many students wore glasses
  4. Maths

    Please help... The ratio of the number of boys to that of girls in Class A is 2 : 3. The ratio of the number of girls who wear glasses to the number of girls who do not wear glassesis 1:3. If there are 12 more girls than boys, how …
  5. mathematics

    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 …
  6. math

    There are 24 students in a class. One student will be randomly selected as representative on the student council. if there are 9 boys and 15 girls in class, what is the probability that the representative will be a boy?
  7. math

    In a certain high school class, consisting of 60 girls and 40 boys , it is observed that 24 girls and 16 boys wear eyeglasses. If a student is picked at rondom from this class, the probability that the student wears eyeglasses is 40/100. …
  8. Math

    Five out of twenty students wear glasses what is the probability that a student selected at random does not wear glasses
  9. Geometry

    When Ms Shreve randomly selects a student in her class, she has 1/3 probability of selecting a boy. A: If her class has 36 students, how many boys are in her class?
  10. Math

    In a class, 2/7 of the pupils are girls. 1/2 of the girls and 1/3 of the boys in the class wear glasses. If 10 boys wear glasses, how many of the girls wear glasses?

More Similar Questions