Question

A class consist of 21 boys and 19 girls. A student is selected for some

Social work. Find the probability that a girl is selected.​

Answer 1

Step-by-step explanation:

total students = 21 + 19 = 40

A = Girls is selected

n(A) = 19P1

thus, p(A) = 19/40

Answer 2

Step-by-step explanation:

formula for finding probability is

$\frac{total \: no \: of \: favourable \: outcome}{total \: no \: of \: possible \: outcome}$

so ,in here total no of students which is the possible outcome is 21 boys and 19 girls

=21 +19

=40 students

favourable outcomes = 19

therefore

probability of a girl being selected = 19/40