Question

1). if a class has 20 boys and 30 girls. what is the probability that a girl is
picked as a class representative? *​

Answer 1

Answer:

No. Of boys=20

No. Of girls=30

Therefore, Total Class Strength = 20+30=50

Let E be the event that a girl is picked as a class representative.

Now, P(E) = No. Of girls in the class/Total Class Strength

=>P(E) = 30/50

= 3/5 or 0.6 Ans.

Answer 2

Answer:

Probability of a girl becoming the class representative is  $\frac{3}{5}$.

Step-by-step explanation:

Given,

No. of girls        =30

No. of boys      =20

Total students = 20+30

                        =50

Probability       =  $\frac{No. of favorable outcomes}{Total no. of outcomes}$

The probability that a girl is picked as a class representative

                         =  $\frac{No. of girls}{Total no. of students}$

                         =       $\frac{30}{50}$

                         =       $\frac{3}{5}$