The two-way table of row relative frequencies below shows data on nationality and eye color. Brown or hazel Eyes Blue or Green eyes Other Row Total English 0.48 0.50 0.02 1.00 German 0.47 0.52 0.01 1.00 Italian 0.80 0.18 0.02 1.00 Based on the data, which of the following statements must be true? (Choice A) A There are the same number of English people and Italian people with other eye colors. (Choice B) B Italians are more likely to have brown or hazel eyes than Germans are. (Choice C) C A German person is more likely to have brown or hazel eyes than to have blue or green eyes. (Choice D) D A person with brown or hazel eyes is least likely to be German.

b

Step-by-step explanation:

it is correct on khan

a

step-by-step explanation:

strong negative correlation

(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