Question 31 In a sample of 100 cars, 57 were ACTregistered, 39 were white, 28 were Teyetas and 7 had none of these characteristics. Given that 9 of

My approach is:

|A v B v C| = |A| + |B| + |C| - |A ∧ C| - |B ∧ C| - |A ∧ B| + |A ∧ B ∧ C|

36+16+2 = 36+16+2-12-14-9+x

x=35

I'm not sure if my answer is correct or not. Please correct me if I'm wrong.

Thanks

Question 31 In a sample of 100 cars, 57 were ACT—registered, 39 were white, 28 wereTeyetas and 7 had none of these characteristics. Given that 9 of the ACT—registered carswere whiteJ 14 of the white cars were Teyetas and 12 of the Teyetas were ACT—registered,hew Inanjyr had all three characteristics?