Obliczmy kąty poszczególnych wycinków.

 

Ocena 1:

$\frac{20}{200}\cdot {360}^{\circ }=\frac{1}{10}\cdot {360}^{\circ }={36}^{\circ }$   

 

Ocena 2: 

$\frac{35}{200}\cdot {360}^{\circ }=\frac{{12600}^{\circ }}{200}={63}^{\circ }$  

 

Ocena 3:

$\frac{60}{200}\cdot {360}^{\circ }=\frac{3}{10}\cdot {360}^{\circ }={108}^{\circ }$  

 

Ocena 4:

$\frac{45}{200}\cdot {360}^{\circ }=\frac{9}{40}\cdot {360}^{\circ }=\frac{{3240}^{\circ }}{40}={81}^{\circ }$  

 

Ocena 5:

$\frac{30}{200}\cdot {360}^{\circ }=\frac{3}{\sout{20}{}_1}\cdot \sout{{360}^{\circ }}{}^{{18}^{\circ }}={54}^{\circ }$   

 

Ocena 6:

$\frac{10}{200}\cdot {360}^{\circ }=\frac{1}{20}\cdot {360}^{\circ }={18}^{\circ }$  

 

Wykres kołowy: