De los 45 alumnos que hay en un grupo, 9 obtuvieron calificación mayor de 8. ¿que parte del grupo obtuvo 8 o menos de calificación

The probability that an adult possesses a credit card is .70. a researcher selects two adults at random. by assuming the independence, the probability that the first adult possesses a credit card and the second adult does not possess a credit card is:

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?