Exam 30: Introduction to Probability

A hotel stocks white, cream and blue pillowcases. Currently they have 400 white, 120 cream and 80 blue pillowcases. What is the probability of picking a blue pillowcase at random (3 decimal places)?

If p(E) = 0.35, which of the following options is the correct value of p()?

A company its IT equipment. It notes the computers over 3 years old and those that are laptops. Which of the following statements is NOT true?

A factory that fills bags of rice samples its production and found that out of 500 bags tested 350 were of the correct weight, 120 were too heavy and the remainder were too light. What is the empirical probability of a bag being too light (2 decimal places)?

Which of the options below is the correct definition of an event set (E) that describes odd rolls of a 6-sided die?

A shipping company has 2 sizes of box each of which is available in 2 colours. If the probability of a box being 'large' is 0.62 and the probability of a box being 'grey' is 0.34 what is the probability of the next box being 'large' and 'grey' (2 decimal places)?

Which of the following events are NOT independent?

A construction firm in Oman is running two projects (A and B). The probability that A will complete on time is 0.85 and the probability that B will complete on time is 0.65. What is the chance that only one of these projects will complete on time (2 decimal places)?

Which of the following statements about statistical experiments is NOT true?