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| rev | Admin | (Created page with "'''Solution: C''' The number of boys say <math>N</math> is less than equal to 1. The probability that there are no boys only occurs when we have 3 girls and this equals (1/2)<sup>3</sup>. Hence the expected number of boys equals 1-0.125 = 0.875.") | Jun 26'24 at 2:30 | +246 |