The classic performance equation is:
ET = IC*CPI*CT

Suppose that you are trying to learn more about a Pentium 3 and Pentium 4 processors and how they execute a specific new program. Thanks to a website - you learn that a 1Ghz Pentium 3 can execute the program in 3 seconds. You also learn that a 2Ghz Pentium 4 runs it in 2 seconds.

The information on the website says the Pentium 4 ran had a CPI of 2.0 but does not provide the CPI for the Pentium 3. What was the CPI on the Pentium 3?

Hint - Since this program runs on either x86 machine - you know the instruction count is the same.
Choose one answer.
a. 1.0
b. 6.0
c. 3.5
d. 1.5
e. 2.0