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How do genes determine the traits of an organism? Any Roofer in Ann Arbor-Area? How many chlorine atoms are in 0.650 mol of Ca(ClO4)2? Why are planets and moons (I guess stars too) round? An unbiased coin is tossed 'n' times Let the random variable X denote the number of times the head occurs if P(X=1) ,P(X=2) and P(X=3) are?