Compound Inequality is the coupling of two simple inequalities connected by the conditions 'and' or ‘or’

     Compound inequality is formed by joining two inequalities with a connective word such as "and" or "or". 
     The solution set of a compound inequality with the connective word "and " is the set of all elements common 
     to the solution sets of both inequalities. 
     The solution set of a compound inequality with the connective word "or" is the union of the solution sets of the two inequalities.