P(TV)*P(Girl) = 0.30*0.55 = 0.165 which rounds to 0.17 We'll use this value later. So let's call this M = 0.17
Look in the "girl" row and "tv" column. The value 17 is here. This is out of 100 people total, so P(TV and Girl) = 17/100 = 0.17 Call this value N = 0.17
Because M = N = 0.17 approximately, this means that the two variables "TV" and "Girl" are approximately independent
So the equation P(TV and Girl) = P(TV)*P(Girl) is approximately true in this example.
Cost of airplane toy = $4.84 let x be the cost of the toy car cost of airplane toy is 4 times the cost of toy car; it means 4x = $4.84 x = 4.84 / 4 x = 1.21 Thus, the cost of toy car is $1.21.
