Question

A class consists of $12$ boys and $18$ girls. Exactly half of the boys and half of the girls have brown eyes. Determine the probability that a randomly selected student will be a boy or a student with brown eyes.

• A. $0.4$
• B. $0.5$
• C. $0.7$
• D. none of these

Answer 1

The correct option is C $0.7$

Total no of students=$12\left(boys\right)+4\left(girls\right)$

Selecting a boy among total no of boys=$12\ast 1$$=12$

2.Selecting a student from total $=16\ast 1=16$

Probability of selecting a boy from the class =

$\frac{12}{16}$$=\frac{3}{4}=0.7$