Question

The daily rainfall for each day of a week in a certain city is given in millimeters find the average rainfall during the week 9 ,11 ,8, 20 ,10 ,16 ,12

Answer 1

$\huge \text {Question - }$

The daily rainfall for each day of a week in a certain city is given in millimeters find the average rainfall during the week 9 ,11 ,8, 20 ,10 ,16 ,12

$\huge \text {Answer - }$

Given -

• Daily rainfall for each day of a week - 9 ,11 ,8, 20 ,10 ,16 ,12

To Find -

• Average rainfall during the week

Formula Used -

$\begin{gathered} \longmapsto \bf { \dfrac{sum \: of \: all \: observations}{total \: no. \: of \: observations} } \\\end{gathered}$

Solution -

Sum of all observations -

$\begin{gathered} \longmapsto \rm { 9 + 11 + 8 + 20 + 10 + 16 + 12 } \\\end{gathered}$

$\begin{gathered} \longmapsto \rm { 86 } \\\end{gathered}$

Total no. of observations -

$\begin{gathered} \longmapsto \rm { 7 } \\\end{gathered}$

Putting the value in the formula.

$\begin{gathered} \longmapsto \bf { \dfrac{sum \: of \: all \: observations}{total \: no. \: of \: observations} } \\\end{gathered}$

$\begin{gathered} \longmapsto \rm { \dfrac{86}{7} } \\\end{gathered}$

$\begin{gathered} \longmapsto \bf \blue{ 12.28 \: mm } \\\end{gathered}$