In a large group of employees, the probability that an employee has a company phone ( $P$ ) is 0.45, the probability that they have a company laptop ( $L$ ) is 0.60, and the probability they have both is 0.30.

Find the probability that a randomly chosen employee has a company phone or a company laptop, $\cup L)$ .

Given that a randomly chosen employee has a company laptop, find the probability they also have a company phone, $P (P ∣ L)$ .

Find the probability that a randomly chosen employee does not have a company phone, given that they do not have a company laptop, $P (P^{'} ∣ L^{'})$ .

Find the probability that a randomly chosen employee has a company phone or a company laptop, $\cup L)$ .

Given that a randomly chosen employee has a company laptop, find the probability they also have a company phone, $P (P ∣ L)$ .

Find the probability that a randomly chosen employee does not have a company phone, given that they do not have a company laptop, $P (P^{'} ∣ L^{'})$ .

4.1 Probability (A-level only)

Question 33

Markscheme

4.1 Probability (A-level only)

Question 33

Markscheme

4.1 Probability (A-level only)

Question 33

4.1 Probability (A-level only) Questions

4.1 Probability (A-level only)

Question 33

4.1 Probability (A-level only) Questions