Question

Two students from a group of eight boys and 12 girls are sent to represent the school in a parade.

If the students are chosen at random, what is the probability that the students chosen are not both girls?

a. 12/190
b. 33/95
c. 62/95
d. 178/190

Answer 1

62/95

Explanation:

none

Answer 2

c. 62/95

Explanation

Probability is the chance of an event happening.

Probability = (favorable outcome)/(total outcome)

P(girl) = 12/20 × 11/19

= (12×11)/(20×19)

= 132/380

= 33/95

P( not a girl) = 1 - 33/95

= 62/95