In a scientific research facility with 200 doctoral candidates, researchers are categorized by their primary field: Biology, Chemistry, or Physics. The following table summarizes the distribution of researchers and whether they have been awarded a research Grant or Not.
| Grant awarded (GGG) | No Grant (G′G'G′) | |
|---|---|---|
| Biology (BBB) | 24 | 36 |
| Chemistry (CCC) | 42 | 28 |
| Physics (PPP) | 30 | 40 |
A researcher is selected at random from the facility. Determine:
P(C)P(C)P(C)
P((B∩G)′)P((B \cap G)')P((B∩G)′)
P(G∣P)P(G | P)P(G∣P)
Let A A\,A be the event that a researcher has published a first-author article this year. Given that 30% of Biologists have published a first-author article, 10% of Chemists have published a first-author article, and 20% of Physicists have published a first-author article,
describe the structure of a Venn diagram to represent the events BBB, CCC, P P\,P and AAA.
find the probability that a randomly selected researcher has published a first-author article this year.
111 exam-style questions on WJEC A Level Maths 4.1.1 Probability (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.