Question

The 1st 3 members of the stilt walking relay team finished their laps of the race with the mean time of 53 seconds per lap what meantime for the next 2 members will give an overall Team mean of 50 seconds per lap?

Answer 1

we can use an average between the first 3 and the second 2 and the average must be 50 so

`(53+x)/(2)=50`

where x is the time of the seconds 2 runners

now we solve x

`\begin{gathered} 53+x=50*2 \\ x=100-53 \\ x=47 \end{gathered}`

the time of the second runners must be 47 seconds per lap