Question

there are 20 boys and 30 girls in a class. a student is chosen at random. find the probability that chosen student a boy and a girl​

Answer 1

Answer:

P(B)=2/5 ; P(G)=3/5

Step-by-step explanation:

no of students n(S)=50

no of boys n(B)=20

no of girls n(G) =30

P(B)=20/50

=2/5

P(G) =30/50

=3/5

Answer 2

Answer:

Probabilities of a boy and a girl are 2/5 and 3/5

Step-by-step explanation:

Given,

Boys = 20,

Girls = 30,

Total students = 20 + 30 = 50,

$\text{Probability}=\frac{\text{Favourable outcomes}}{\text{Total outcomes}}$

If a student is chosen randomly,

Then, the probability that student is a boy = $\frac{\text{Number of boys}}{\text{Total students}}$

$=\frac{20}{50}$

$=\frac{2}{5}$

Similarly, the probability that student is a boy = $\frac{\text{Number of girls}}{\text{Total students}}$

$=\frac{30}{50}$

$=\frac{3}{5}$

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