At a dog competition, a dog is awarded 10 points if it runs through 4 pipes, makes 10 jumps, and walks on 2 beams. If Roofy gets 9 points after missing a pipe and Ralph gets 7 points after missing a pipe and a beam, how many points does Butch get if he misses 4 jumps but goes through the rest of the exercises perfectly?

Butch should be awarded with 9,2 points

Step-by-step explanation:

Roofy gets 9 points out of 10 missing only a pipe, that means that each pipe is awarded with 1 point

Ralph gets 7 points out of 10 missing one pipe ( 1 point ) and 2 points missing a beam

So points are awarded as follows

1 point by pipe              then 4 points   for    4 pipes

2 points by beam         then  4 points  for     2 beams

We just have 2 points to award 10 jumps then each jump is awarded by 0,2 points

Finally as Butch missed 4 jumps, Butch should be awarded with 9,2 points

i believe the correct answer is b.