Events, axioms and probability laws

STA 112. Practice questions, not past papers.

Lessons

• Events and axioms
• Addition, complements and independence

Practice questions

1. Mutually exclusive events have what property?

   Statistics study edition practice item Q097; Source: T56-61, S12, S27

2. Independent events satisfy which identity?

   Statistics study edition practice item Q098; Source: T56-61, S12, S27

3. The general addition rule subtracts which term?

   Statistics study edition practice item Q099; Source: T56-61, S12, S27

4. Two disjoint events each having positive probability are what?

   Statistics study edition practice item Q100; Source: T56-61, S12, S27

5. P(A)=0.4, P(B)=0.5, P(A∩B)=0.2. Find P(A∪B). Give the value to 4 decimal places.

   Statistics study edition practice item Q101; Source: T60-61

6. P(A)=0.6, P(B)=0.3, P(A∩B)=0.1. Find P(A∪B). Give the value to 4 decimal places.

   Statistics study edition practice item Q102; Source: T60-61

7. P(A)=0.7, P(B)=0.6, P(A∩B)=0.5. Find P(A∪B). Give the value to 4 decimal places.

   Statistics study edition practice item Q103; Source: T60-61

8. The event of both A and B is their _____.

   Statistics study edition practice item F033; Source: T56-61, S12, S27

9. Events that cannot occur together are mutually _____.

   Statistics study edition practice item F034; Source: T56-61, S12, S27

10. If P(A)=0.4, P(B)=0.5 and P(A∩B)=0.2, P(A∪B)=_____.

    Statistics study edition practice item F035; Source: T56-61, S12, S27

Topic gap report