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

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

the solution is 12x-6y

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