Answer:
1/12
Step-by-step explanation:
Probability is the result of the number of possible outcome divided by the number of total outcome.
Given that the box contains a red shirt, a blue shirt, a black trouser, and a red trouser, the number of total outcome is
= 1 + 1 + 1 + 1
= 4
The possibility of picking;
a black trouser is
= 1/4
then a red (without replacement, the total outcome drops to 3)
= 1/3
Hence, the probation choosing the black trouser and the red shirt without replacement
= 1/4 * 1/3
= 1/12
