# RISKBIMONIAL function from Palasades @RISK for pooling and not pooling?

#### moe10134

##### Board Regular
The Business School at State University currently has three parking lots, each containing 155 spaces. Two hundred faculty members have been assigned to each lot. On a peak day, an average of 70% of all lot 1 parking sticker holders show up, an average of 72% of all lot 2 parking sticker holders show up, and an average of 74% of all lot 3 parking sticker holders show up.

a. Given the current situation, estimate the probability that on a peak day, at least one faculty member with a sticker will be unable to find a spot. Assume that the number who show up at each lot is independent of the number who show up at the other two lots. Compare two situations: (1) each person can park only in the lot assigned to him or her, and (2) each person can park in any of the lots (pooling). (Hint: Use the RISKBINOMIAL function.) If needed, round your answer to a whole percentage and if your answer is zero, enter "0".

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#### shg

##### MrExcel MVP
I dunno anything about @Risk, but ...

 A​ B​ C​ 1​ Prob(show)​ Prob(no spot)​ ​ 2​ 70%​ 0.72%​ B2: =1 - BINOM.DIST(155, 200, A2, TRUE) 3​ 72%​ 3.28%​ 4​ 74%​ 11.20%​

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