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

The correct answer is:

C.
`(62)/(95)`

If the students are chosen at random the probability that the students chosen are not both girls is
`(62)/(95)`.

`|Huntrw6|`

Answer 2

The answer is 62/95. You determine this by calculating the probability of both students being girls.

Probability first student is girl: 12/20
Probability second student is girl: 11/19
Multiply 12/20 * 11/19 = 132/380 or 0.347
Probability of both students not being girls: 1 - 0.347 = 0.653 or 62/95