According to harper's index, 55% of all federal inmates are serving time for drug dealing. a random sample of 20 federal inmates is selected. (a) what is the probability that 11 or more are serving time for drug dealing? (round your answer to three decimal places.) (b) what is the probability that 2 or fewer are serving time for drug dealing? (round your answer to three decimal places.) (c) what is the expected number of inmates serving time for drug dealing? (round your answer to one decimal place.)

a) P = 0.591

b) P = 0.0000358

c) 11 inmates

Step-by-step explanation:

This is a binomial distribution exercise.

Where p = 0.55 is the success probability

The random variable is X : ''number of inmates serving time for drug dealing''

X ~ Bi(n;p)

Where n is the random sample and p is the success probability

The probability function is :

Where nCx is the combinatorial number define as

a)

b)

c) The expected number for X is

77

step-by-step explanation:

answer: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.

step-by-step explanation: if you weigh 60 pounds on earth, on the moon you will weigh about 10 pounds. if you weigh 120 pounds on earth, you will weigh about 20 pounds on the moon. since weight is caused by the mass of two objects that are near each other, the bigger the objects, the more the force of gravity.