Distribution 81926

There are 28 pupils in the class. Twenty-seven of them wrote the control paper in mathematics. Four students had a one, 8 had a two, 12 students had a three, and 3 had a four. Express this distribution as a percentage.

Correct answer:

a =  14.2857 %
b =  28.5714 %
c =  42.8571 %
d =  10.7143 %
e =  3.5714 %

Step-by-step explanation:

$a=100\cdot \frac{4}{28}=\frac{100\cdot 4}{28}=\frac{400}{28}=\frac{100}{7}\%=14.2857\%$

$b=100\cdot \frac{8}{28}=\frac{100\cdot 8}{28}=\frac{800}{28}=\frac{200}{7}\%=28.5714\%$

$c=100\cdot \frac{12}{28}=\frac{100\cdot 12}{28}=\frac{1200}{28}=\frac{300}{7}\%=42.8571\%$

$d=100\cdot \frac{3}{28}=\frac{100\cdot 3}{28}=\frac{300}{28}=\frac{75}{7}\%=10.7143\%$

$e=100\cdot \frac{28-27}{28}=\frac{25}{7}\%=3.5714\%$

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