blue645
2

The average height of three students is 68 inches. If two of the students have heights of 70 inches and 72 inches respectively, then what is the height (in inches) of the third student?

Write the following equation: $\frac{70+72+x}{3}=68\\ \\ 142+x=3*68\\ \\ 142+x=204\\ \\ x=204-142\\ \\ x=62 \ in$