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In a class composed of x girls and y boys, a random student was picked, what are the chances this is a girl describe mathemathically? *



Answer :

reinhard10158

Step-by-step explanation:

a probability (chance) is always the ratio of

desired cases / totally possible cases

so, in our case here, the whole class represents the totally possible cases (as when a student is picked, he or she is picked from the total set of students in this class).

that total is : x + y

now, our desired case is to pick a girl.

that means the desired cases are x.

and so, the probability to pick a girl in this class is

x/(x+y)

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