Probability of 3 letters With Repetition are Vowels

This video explains how to determine the probability that 3 randomly typed letters with repetition are all vowels.

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Probability of 4 letters With No Repetition are Vowels

This video explains how to determine the probability that 4 randomly typed letters without repetition are all vowels.

General Solution to a Second Order Homogeneous Cauchy-Euler Equation (distinct real)

This video provides an example of how to solve a second order homogeneous Cauchy-Euler Equation with the auxiliary equation has two distinct real roots.