Abook has 200 pages. the number of mistakes on each page is a poisson random variable with mean
0.01, and is independent of the number of mistakes on all other pages.
(a) what is the expected number of pages with no mistakes?
(b) a person proofreading the book finds a given mistake with probability 0.9. what is the expected number of pages
where this person will find a mistake?
(c) what, approximately, is the probability that the book has two or more pages with mistakes?

Savannah is painting a striped background for a mural on a wall that is 1515 yards long. she wants a total of 9696 stripes that are all the same width. which calculation should savannah use to decide how wide to make each stripe?

The diagram represents the polynomial 4x2 + 23x – 72. what is the factored form of 4x2 + 23x – 72? (4x + 8)(x – 9) (4x – 8)(x + 9) (4x + 9)(x – 8) (4x – 9)(x + 8)

The management of a supermarket wants to adopt a new promotional policy of giving a free gift to every customer who spends more than a certain amount per visit at this supermarket. the expectation of the management is that after this promotional policy is advertised, the expenditures for all customers at this supermarket will be normally distributed with a mean of $95 and a standard deviation of $20. if the management wants to give free gifts to at most 10% of the customers, what should the amount be above which a customer would receive a free gift?