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What is the difference between an african kente hat and a kuli kofia koofi hat? Why is always a problem in recent years, aircraft, whether artificially or incidents? How long do the batteries in Beats executives last? ~ x + y + z = 3, x² + y² + z² = 5, x³ + y³ + z³ = 7 ➪ x⁴ + y⁴ + z⁴ = ? Let X1 & X2 have joint pmf p(x1, x2)=(x1x2)/36. 0 otherwise Find joint pmf of Y1=X1X2 and Y2=X2?