How Many Permutations of the 26 Letters of the Alphabet

question 107

Short Answer

How many permutations of the 26 letters of the alphabet are there that do not contain any of the following strings: LOP, SLOP, SLOPE, LOPE.

---

Definitions:

Predictive Validity

Predictive validity refers to the extent to which a score on a scale or test predicts future behavior or outcomes.

IQ Test

A uniform test intended to evaluate a person's intelligence and cognitive capacities.

Predictive Validity

How well a rating on an examination or metric anticipates subsequent success in a similar endeavor.

Standard Deviation

A measure of the amount of variation or dispersion of a set of values.