Hello, in my studies of PMBOK I noticed a something that I need help with.
In section 11.4.2.2 there is a section "Modelling and Simulation" which has a figure 11.17, using data from Figure 11.13. I understand the concept of how this works, what I don't get is how they arrive at 12%, the formula for the "y" value on cumulative curve with the mode (most likely result) being known is, (c-a)/b-a), which in this case equals 0.27 .
Please can someone help clarify this for me?