Question

there are 60 boys and 40 girls in a class a student is selected at random find the probability that student is a girl

Answer 1

total students = 60 + 40 = 100 
no of girls = 40
Thus,
Probability of selecting a girl = 40 /100 = 4 / 10.

Answer 2

Answer:

Probability of a selected student is a girl = $\frac{2}{5}$

Step-by-step explanation:

Given

number of boys in a class = 60

number of girls in the class = 40

Total students in the class = 60+40

= 100

Number total possible outcomes (S) = 100

According to the problem given,

If a student is selected at random ,

Number of favourable outcomes (E) = 40

Now,

Probability of a selected student is a girl = E/S

= 40/100

= 2/5

Therefore,

Probability of a selected student is a girl = $\frac{2}{5}$

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