Determine whether the pair of lines appear to be parallel or perpendicular.

The person above is 100% correct. Parrallel lines don't cross over each other, they are two straight lines in a plane that do not intersect at any point, while perpendicular lines cross over each other at a specific point. The image I uploaded below represents parallel lines, while the pair of lines in the image of the question above are perpendicular.

blue marble is 15 times out of 50 = 15/50 reduces to 3/10

landing on tails is 24 out of 50 = 24/50 reduces to 12/25

to find the probability of both multiply together:

3/10 x 12/25 = 3 x 12 / 10 x 25 = 36/250

if you multiplied the numerator and denominator by 10 you get 360/2500.

the answer is 360/2500