2.0.2
3.0.3413
4.1
5. /p>
7.8. La pregunta está incompleta
9. La pregunta no está clara
10 Distribución marginal x = 0p = 1/4 1/6 1/8 = 13 /24x = 1p = 1-13/.
Y = 0 P = 1/4 1/4 = 1/2Y = 1 P = 1/6 1/8 = 7/24Y = 2 P = 1/8 1/12 = 5/24
EX = 11/24 EY = 7/24 2 * 5/24 = 17/24
11k = 1/8 ex^2=8 p(-2 lt; lt2 )=1/4
12 X = 0 P = 0.01 X = 1 P = 0.18 y = 3p = 0.81
25 calificados (20.01-20)/(0.203 * 3) = 0,148