When Finding Percentiles, If the Locator L Is Not a Whole

Multiple Choice

When finding percentiles, if the locator L is not a whole number, one procedure is to interpolate so that a locator of 23.75, for example, leads to a value that is 3/4 of the way between the 23rd and 24th scores. Use this method of interpolation to find P75 for the set of test scores below. $$\begin{array} { l l l l l l } 51 & 54 & 64 & 68 & 72 & 74 \\78 & 83 & 91 & 94 & 99 &\end{array}$$

A) 83
B) 85
C) 87
D) 91