in a class there are y boys and x girls a student is selected random, then find the probability of selecting a boy?
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Answer:
y / (x + y)
Step-by-step explanation:
Sample space = {x,y}
No. of boys = y
No. of girls = x
therefore, Total no. of students = y+x
Event(E) = Selecting a boy
P = No. of favourable outcomes / Total no. of outcomes
therefore, P(E) = y / (x+y)
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