Generate Math Exams and Quizzes in LaTeX and pdf formats

A bag contains 1 green, 1 red, and 4 black marbles. If two marbles are drawn and the first one is green, what is the probability that the second marble is red?

There are 5 marbles left in the bag and there is 1 red marble in the bag. The probability is \(\displaystyle \frac{1}{5}\)

Download \(\LaTeX\)

\begin{question}A bag contains 1 green, 1 red, and 4 black marbles. If two marbles are drawn and the first one is green, what is the probability that the second marble is red? 
    \soln{9cm}{There are 5 marbles left in the bag and there is 1 red marble in the bag. The probability is $\frac{1}{5}$}

\end{question}

Download Question and Solution Environment\(\LaTeX\)

\documentclass{article}
\usepackage{tikz}
\usepackage{amsmath}
\usepackage[margin=2cm]{geometry}
\usepackage{tcolorbox}

\newcounter{ExamNumber}
\newcounter{questioncount}
\stepcounter{questioncount}

\newenvironment{question}{{\noindent\bfseries Question \arabic{questioncount}.}}{\stepcounter{questioncount}}
\renewcommand{\labelenumi}{{\bfseries (\alph{enumi})}}

\newif\ifShowSolution
\newcommand{\soln}[2]{%
\ifShowSolution%
\noindent\begin{tcolorbox}[colframe=blue,title=Solution]#2\end{tcolorbox}\else%
\vspace{#1}%
\fi%
}%
\newcommand{\hideifShowSolution}[1]{%
\ifShowSolution%
%
\else%
#1%
\fi%
}%
\everymath{\displaystyle}
\ShowSolutiontrue

\begin{document}\begin{question}(10pts) The question goes here!
    \soln{9cm}{The solution goes here.}

\end{question}\end{document}