Posted by **Sherri** on Sunday, December 14, 2008 at 7:35pm.

If the probability of a dancing lady accepting an initation to dance is 0.18, find the expected number of ladies you would have to ask before one accepts.

I think that the answer is: 1(.18)+2(.18)+3(.18)...7(.18)+8(.18)+9(.18)=8.1

*round answers to three signifcant figures*

- math- statistics -
**bobpursley**, Sunday, December 14, 2008 at 7:40pm
? The first one could accept. So one.

What certainty of accepatnce are you seeking? 90Percent? 99 Percent? There is a probability you could ask 50 without getting an acceptance. Your method is not right, but the basic question remains, with what certainity?

- math- statistics -
**Sherri**, Sunday, December 14, 2008 at 9:16pm
90% i forgot to say that

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