# SOLUTION: how do I solve probability of compound events like this: P(male or ninth grader) if this is the problem: A student is selected at random from a group of male a

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 Algebra: Proportions Solvers Lessons Answers archive Quiz In Depth

 Question 28924: how do I solve probability of compound events like this: P(male or ninth grader) if this is the problem: A student is selected at random from a group of male and female students in the seventh, eighth, or ninth grade. Answer by stanbon(57231)   (Show Source): You can put this solution on YOUR website!Prob (male or ninth grader)=Prob(male)+Prob(ninth grader)-Prob (male and ninth grader) Notice: "male and ninth grader" means a ninth grader who is male. Cheers, Stan H.