A checkpoint was used to test a total of 20 trucks. 6 trucks did not pass the brakes test ($B$). 7 trucks did not pass the lights test ($L$). 9 trucks passed both the brakes and lights tests. A Venn diagram is displayed with two overlapping circles labelled $B$ and $L$ inside a universal set.
(a(i))[2]
Complete the Venn diagram provided.
(a(ii))[1]
Find the value of $n(B' \cap L')$.
(b)[1]
Shade the part $(P \cup Q) \cap Q'$.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Accurate Venn placement” …