Answer:
17
Step-by-step explanation:
The median of a data set is found by putting the data set in ascending numerical order and identifying the middle number. If there are an odd number of data values in the data set, the median is a single number. If there are an even number of data values in the data set, the median is the average of the two middle numbers. Sorting the data set for the values entered above we have:

Since there is an even number of data values in this data set, there are two middle numbers. With 8 data values, the middle numbers are the data values at positions 4 and 5. These are 16 and 18. The median is the average of these numbers. We have

Therefore, the median is

2+3=5 no
2+5=7 no
2+8=10 yes (if zero counts as an even number)
5+3=8 yes
5+8=13 no
8+3=11
So 2/6 = 1/3 1/3 should be the answer
Answer:
a)

b) 
c) 
d) 
e) 
Step-by-step explanation:
1) Previous concepts
The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".
2) Solution to the problem
Let X the random variable of interest, on this case we now that:
The probability mass function for the Binomial distribution is given as:
Where (nCx) means combinatory and it's given by this formula:
3) Part a

4) Part b


5) Part c
![P(X \leq 16)=1-P(X>16)=1-P(X\geq 17) = 1-[P(X=17)+P(X=18)+P(X=19)+P(X=20)+P(X=21)+P(X=22)]](https://tex.z-dn.net/?f=P%28X%20%5Cleq%2016%29%3D1-P%28X%3E16%29%3D1-P%28X%5Cgeq%2017%29%20%3D%201-%5BP%28X%3D17%29%2BP%28X%3D18%29%2BP%28X%3D19%29%2BP%28X%3D20%29%2BP%28X%3D21%29%2BP%28X%3D22%29%5D)

6) Part d
The expected value is:

7) Part e
The variance is given by:

The rate a computer works is 1/time. Working together, you add the rates.
Let new computer be x, old computer be y.
x = y - 7

Rounded to nearest tenth gives:
x = 23 hours
The answer would be C because the inequality is greater than 70 but less then 80.