Answer:

Step-by-step explanation:
Given

First, we need to list the multiples of 5

Then, multiples of 3
Next, is to list out the common elements in both


The required probability is then calculated as thus:



See picture for answer and solution steps.
Answer:
z = 60
Step-by-step explanation:
z/3 = 20. (Multiply both sides by 3 to isolate ‘z’)
20 • 3 = 60