Question

The mean of six numbers is 5. Five of the numbers are 6, 6, 5, 3 and 1.
Work out the sixth number.

Answer 1

Answer:

9

Step-by-step explanation:

let the no. be x

6+6+5+3+1+x/6 =5

21+x/6=5

21+x=30

x=9

Answer 2

Let sixth no A

mean= sum of terms÷ number of terms

5= 6+6+5+3+1+A÷ 6

5=21+A÷ 6

5×6= 21+A

A+21= 30

A= 30-21=9