Answer:
1/2 a box
Step-by-step explanation:
as you are sharing 4 objects between 8 people, all you have to do is divide them.
4 ÷ 8 = 0.5 (1/2)
Hence, the probability of a Negative test is .
(a)
Let Drug user and Test positive
Probability of drug users
(b)
Find the Probability of a Negative test,