Mean = Σx/n
58 = Σx/12
696 = Σx
52 = Σx/6
312 = Σx
New mean = (696+312)/18 = ?
A group of 12 students has average height of 58 inches. Another group of 6 students have an average of 52 inches. What is average height of 18 students combined.
3 answers
55 inches
56 inches