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If I select 10 number randomly out of 160, how likely will the mean of the 10 number be equal to the mean of the total 160 number? Suppose that sec(t)=-13/3 and that t is in quadrant 2. Find the exact value of tan(t)? What is a recomended tree patch? Three consecutive even integers are such that the square of the third is 76 more than the square of the second. Find the three integers? Flickr login problem?