Question

The ages of five students in a class are 11, 11.5, 12, 14, 12.5 The mean age (in years) is

(a)10.2 (b) 11.2 (c) 12.2 (d) 13.2

Answer 1

Mean= Sum of all values ÷ Number of values

so...

the answer is 14.6

hope you are all clear with mean now just use the formula everytime when calculating MEAN

Answer 2

Answer: c)12.2

Explanation:

let me show you how to answer this question

1. add all the numbers 11+11.5+12+14+12.5=61

2. then divide 61 by how many numbers we had to add in this case is 5 (the equal number doesn't count.) 61÷5=12.2