Question

Jordan has 5 pens in his desk; 2 are out of ink. If his mom selects 2 pens from his desk, what is the probability that both are out of ink?

Answer 1

1/10

Explanation:

P( 1st out of ink) = out of ink/total

=2/5

Then we have 4 pens left, 1 out of ink

P( 2nd pen out of ink) = out of ink/total

=1/4

P(2 pens out of ink) =P( 1st out of ink) * P( 2nd pen out of ink)

= 2/5* 1/4

=1/10