Question

If the mean of five values is 10.2 and four of the values are 7,13,14 and 8 find the fifth value

Answer 1

the fifth value = x = 9

Step-by-step explanation:

mean of the five values = 10.2

let the fifth value = x

the values: 7,13,14, 8, and x

`\begin{gathered} 10.2\text{ =}(7+13+14+8+x)/(5) \\ 10.2(5)\text{ = }7+13+14+8+x \\ 51\text{ = }42+x \end{gathered}`
`\begin{gathered} x\text{ = 51-42} \\ x\text{ = 9} \end{gathered}`

the fifth value = x = 9