# Question

In CABG surgery, there is a .00014 probability of a retained foreign body (e.g., a sponge or a surgical instrument) left inside the patient.

(a) In 100,000 CABG surgeries, what is the expected number of retained foreign bodies?

(b) What is the Poisson approximation to the binomial probability of five or fewer retained foreign bodies in 100,000 CABG surgeries?

(a) In 100,000 CABG surgeries, what is the expected number of retained foreign bodies?

(b) What is the Poisson approximation to the binomial probability of five or fewer retained foreign bodies in 100,000 CABG surgeries?

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