People at a local shopping mall were asked how many books they read in the last year. The results are given in the table below. However, one value is missing. Use the
information in the table below for parts a, b and c below.
х
P(x)
0
0.205
1
0.166
2
P(2)
3
0.191
4
0.135
5
0.169
a. What is the value of P(2) that will make the table a probability distribution? (2 points)
b. What is the mean () of the probability distribution constructed in part a? (Round your
answer to 3 decimal places). (1 point)

answer: i think it is (1,-2)

idk

step-by-step explanation:

(b) 240

step-by-step explanation:

first, we use the pythagorean formula using the given side lengths to find x. then we use x to find the side lengths. then we add the side lengths to find the perimeter.

pythagorean theorem formula:

a^2 + b^2 = c^2

(x - 20)^2 + (x - 40)^2 = x^2

x^2 - 40x + 400 + x^2 - 80x + 1600 = x^2

x^2 -120x + 2000 = 0

(x - 100)(x - 20) = 0

x - 100 = 0 or x - 20 = 0

x = 100 or x = 20

we see that the solution x = 20 must be discarded because it will give a negative side length and a side length of 0. the only valid solution is x = 100.

perimeter = sum of the lengths of the sides

perimeter = x + x - 20 + x - 40

perimeter = 3x - 60

replace x with 100.

perimeter = 3(100) - 60

perimeter = 300 - 60

perimeter = 240

step-by-step explanation:

im not sure what the answer is