title: Difference between instruction reference and data refernce
body: <p>I'm not able to get why 0.4 is used in finding miss rate of data cache rather than using 0.3 as it is also given that 30% of the instructions are data refernces.
  (<a href="https://i.stack.imgur.com/jJpC1.png" rel="nofollow noreferrer">https://i.stack.imgur.com/jJpC1.png</a>)</p>