To find the number of different ways the agent can telephone the prospects, you can use the combination formula. The agent is choosing 3 prospects out of 5 for today and 2 prospects out of the remaining 2 for tomorrow.
The number of ways to choose 3 prospects out of 5 for today is given by:
C(5, 3) = 5! / (3!(5 - 3)!) = 10 ways
The number of ways to choose 2 prospects out of the remaining 2 for tomorrow is simply:
C(2, 2) = 1 way
Now, to find the total number of different ways the agent can telephone the prospects today and tomorrow, multiply the two results:
10 ways (for today) * 1 way (for tomorrow) = 10 ways
So, the agent can telephone the prospects in 10 different ways.