Higher June 2019 Paper 3 Q22
22 \(\xi\) = 29 students in a class
C = students who own a cat
D = students who own a dog
(a) A student is chosen at random.
Circle the probability that the student owns a cat or a dog but not both. [1 mark]
- \(\dfrac{12}{29}\)
- \(\dfrac{13}{29}\)
- \(\dfrac{15}{29}\)
- \(\dfrac{20}{29}\)
(b) A student who owns a dog is chosen at random.
Circle the probability that the student also owns a cat. [1 mark]
- \(\dfrac{7}{15}\)
- \(\dfrac{8}{15}\)
- \(\dfrac{7}{29}\)
- \(\dfrac{8}{29}\)
| Answer | Mark | Comments |
|---|---|---|
| \(\dfrac{12}{29}\) | B1 |
| Answer | Mark | Comments |
|---|---|---|
| \(\dfrac{8}{15}\) | B1 |