Colourful\color{#D61F06}{Colourful} Probability

Probability Level 3

A bag contains 66 red\color{#D61F06} {\text{red}} and 33 white{\text{white}} balls.Four balls are drawn out randomly one by one and are not replaced.What is the probability that they are alternatively of different colours?

Details and Assumptions\textbf{Details and Assumptions}

One such sequence may be: red\color{#D61F06} {\textbf{red}},white{\textbf{white}},red\color{#D61F06} {\textbf{red}},white{\textbf{white}}

If the probability can be expressed in the form ab\dfrac{a}{b}where aa and bb are co prime integers then find a+ba+b


Problem Loading...

Note Loading...

Set Loading...