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| rev | Admin | (Created page with "'''Solution: C''' Let <math>n</math> be the number of members. We know that the number of members that show up, say <math>N</math>, is approximately normally distributed with mean <math>np</math> and variance <math>np(1-p)</math>. From the exercise, we know that <math display = "block"> P( N \geq 108 ) \approx 0.025, \, P( N \leq 72) \approx 0.025 </math> or <math display = "block"> P(Z \geq \frac{108-np}{\sqrt{np(1-p)}}) \approx 0.025, \, P(Z \leq \frac{72-np}{\s...") | Jun 27'24 at 3:52 | +1,038 |