Answer:
PDF for a continuous random variable is given. Use the PDF to find (a) and the CDF.
First we need to calculate how many years her brother has when she is 18. As text says he is:
18/3 = 6 years old
Now when she gains another 18 years (36-18=18) he will also gain those 18 years
When she is 36 he will have 6+18=24 years old
Answer is 24.
Answer:
Step-by-step explanation:
So you should know. Can you give us a better picture?