Probability of movie sales is determined.

The probability that person going to a movie will buy a soft drink is 0.20; the probability that the person will buy popcorn is 0.40; and the probability that the person will buy both a soft drink and popcorn is 0.10. If one movie-going person is selected at random, what is the probability that: A) He/she will buy popcorn or a soft drink? B) He/she will buy a soft drink, given that he/she has bought popcorn? C) He/she will buy neither a soft drink nor popcorn?

Probability

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Probability

Records indicate that 70 percent of Canadians submit their income tax returns by March 31 of each year when required to do so. In a random sample of 10 Canadians who are required to submit income tax returns, A) What is the probability that 9 or more will submit their return by March 31? B) What is the probability that exactly 5 will have submitted their return by March 31?

Probability

The average household expenditure in Canada on post-secondary textbooks is approximately normally distributed with a mean of $53.00 and a Standard Deviation of $18.61 (based on data from a study by Statistics Canada on family expenditures). If one household is selected at random, A) What is the probability that its expenditure on post-secondary books is at least $65.00? B) What is the probability that its expenditure on post-secondary books is between $46.00 and $60.00? C) Ninety percent (90%) of households spend less that what amount of post-secondary books?

Probability

Over a long period of time, it has been determined that 70% of Lawyers who take the bar examination pass the examination. Of 500 lawyers who take the examination next, find the probability that 330 or fewer will (Question also contained in attachment)