Please help! The mean of A and B is 40 The mean of B and C is 35 A + B + C = 100 What is the values of A, B and C?
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Originally Posted by Natasha1 Please help! Hi Natasha1 The mean of A and B is 40 The mean of B and C is 35 A + B + C = 100 What is the values of A, B and C? $\displaystyle \frac{A+B}{2}=40\ \Rightarrow\ A+B=80$ $\displaystyle \frac{B+C}{2}=35\ \Rightarrow\ B+C=70$ $\displaystyle A+B+B+C=A+2B+C=80+70=150$ $\displaystyle B=(A+2B+C)-(A+B+C)=150-100$ Then all values may be solved for.
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