The table shows the number of fillings a class of 40 pupils had at the time of a dental inspection. No. of fillings 0 1 2 3 4 5 6 No. of pupils 1 4 8 x 9 y 2 If the mean number of fillings per pupil is $3.2$, find the values of $ x $ and $y$ .
Reveal answer
Fill a bubble to check yourself