1-suppose the time it takes a nine-year old to eat a donut
is between 0.5 and 4 minutes, inclusive. let x = the time,
in minutes, it takes a nine-year old child to eat a donut.
then x^ u (0.5, 4).

a. the probability that a randomly selected nine-year old
child eats a donut in at least two minutes is ?
b. find the probability that a different nine-year old child eats a donut in more than two minutes given that the child has already been eating the donut for more than 1.5 minutes.

0.8571,0.6667

Step-by-step explanation:

Given that the time it takes a nine-year old to eat a donut

is between 0.5 and 4 minutes,inclusive.

Let X = the time,

in minutes, it takes a nine-year old child to eat a donut.

Then X:   U (0.5, 4).

The probability distribution function of X would be

Cumulative function CDF would be

a) The probability that a randomly selected nine-year old

child eats a donut in at least two minutes is

=

b) the probability that a different nine-year old child eats a donut in more than two minutes given that the child has already been eating the donut for more than 1.5 minutes.

=

answer: $34.31

step-by-step explanation:

$11.99 x 3 = $35.97

$35.97 - 10% = $32.37

$32.37 + 6% = $34.31