Question

IN CLASS 10A THERE ARE 30 BOYS AND 20 GIRLS. IN 10B THERE ARE 15 BOYS AND 25 GIRLS. ONE STUDENT IS TO BE SELECTED FROM EACH CLASS.

A) WHAT IS THE PROBABILITY OF BOTH BEING GIRL?

B) WHAT IS THE PROBABILITY OF AT LEAST ONE BOY AND ONE GIRL?

C) WHAT IS THE PROBABILITY OF ONE BOY AND ONE GIRL?​

Answer 1

probability probability of both being girls is equal to 20 girls + 25 upon total number of students that is 20 + 20+ 15 + 25 that is equal to 80.

the probability of being both girls is equal to 45 upon 80 that is equal to 9 upon 16.

ii) probability probability of getting both boys is equal to total number of voice that 35 upon 80 that equal to 7 upon 16.

iii) probability of one boy and one girl is equal to 20 + 25 that is equal to 45 upon 80 that is equal to 9 upon 16.