Una revista publica tres columnas denominadas "Ciencia" (A), "economía" (B) y "entretenimiento" (C). Los hábitos de lectura de un lector seleccionado al azar con respecto a estas columnas están en la tabla adjunta. Determine cuál es Probabilidad que lea B si también lee A o C . Seleccione una respuesta *

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step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for

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