A) in a group of 100 people, each one knows at least 67 other people. prove that there exist 4 people who are mutual friends.

x = 17

step-by-step explanation:

in the given figure, two triangles are inscribed in a circle where ∠bae ≅ ∠dae which makes the side be and de equal so we can write it as:

3x - 24 = x + 10

solving this equation for x to get:

3x - x = 10 + 24

2x = 34

x = 34/2

x = 17

therefore, the value of x = 17.

c

step-by-step explanation:

i think because what else can be a sample of every member