The confectionery company Chocoholly spawn chocolate chips cookies as bit of their production chain. Chocolate?

The confectionery company Chocoholly make chocolate chips cookies as part of their production string. Chocolate chips in the cookies are randomly and independently distributed according to a Poisson distribution next to an average of 9 chocolate chips per cookie.

a)Calculate the probability that a cookie selected at random contains exactly 11 chocolate chips. Give you answer as a decimal to 3 decimal places.

P(a erratic cookie has exactly 11 chocolate chips) =

b)Calculate the probability that in 18 capriciously selected cookies at least 3 own exactly 11 chocolate chips in them. Give you answer as a decimal to 3 decimal places.

P(in 18 randomly special cookies at least 3 have exactly 11 chocolate chips) =

Thanks surrounded by advance
Answers:
a)

P(x; u) = [ (e^-u)(u^x) ] / x!

P(11,9) = [ (e^-9)(9^11) ] / 11!

= 0.097

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