Tarea_Primer_Parcial_v0 - 1 Se realizo un estudio en un rea...

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1.- Se realizo un estudio en un área metropolitana para determinar los ingresos anuales de las parejas casadas en que sólo los maridos proveían de dinero y aquellas en que ambos cónyuges estaban em- pleados. En la tabla se muestra la información obtenida: Evento Ingreso Familiar Mensual % de parejas casadas % de grupo de ingresos con ambos cónyuges trabajando E 1 Menos de $3,000 11 28 E 2 De $3,000 a $4,900 30 43 E 3 De $5,000 a $9,999 24 63 E 4 De $10,000 a $20,000 25 69 E 5 Más de $20,000 10 73 A A C TOTAL E 1 .0308 .0792 .11 E 2 .129 .171 .30 E 3 .1512 .0888 .24 E 4 .17 .08 .25 E 5 .073 .027 .10 TOTAL .554 .446 1 a) ¾Cuál es la probabilidad de que una pareja elegida al azar en esta área tenga dos ingresos? P ( A ) = . 554 b) Si una pareja elegida al azar tiene dos ingresos, ¾cuál es la probabilidad de que el ingreso anual de está pareja sea mayor de $20,000? P ( E 5 \ A ) = P ( E 5 A ) P ( A ) = . 073 . 554 = . 1318 c) ¾Cuál es la probabilidad de que su ingreso anual sea mayor de $5,000?, si la pareja seleccionada tiene dos ingresos. P [( E 3 E 4 E 5 ) | A ] = . 1512 + . 17 + . 073 . 554 = . 3942 . 554 = . 7115 1
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2.-En una mano de póquer que consiste en 5 cartas, encuentre la
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