Counting & ProbabilityEasyIdentities and Techniques, Proved ShareIdentities and Techniques, Proved · Easy problemHow many ordered quadruples (a,b,c,d)(a,b,c,d)(a,b,c,d) of positive integers satisfy a+b+c+d=12a+b+c+d=12a+b+c+d=12?Check Show answer Walk through it step by step Practice more like this Review this concept