We're willing, but sadly not able.
Here's are the other things we'll need before we can attack this one:
1). We need to know how often does Ned swim ?
2). We need to know how often does Ned bicycle ?
3). We need to see that "chart below".
The only thing I see below right now is my dog.
Answer:
JM = 7
Step-by-step explanation:
Triangles LMN and LJK are similar, so corresponding sides have teh same ratio:
LM/MN = LJ/JK
14/(JM+3) = (14 +JM)/15
210 = (JM +3)(JM +14) . . . . . multiply by 15(JM +3)
JM² +17JM -168 = 0 . . . . . . . subtract 210; put in standard form
(JM +24)(JM -7) = 0 . . . . . . factor
The values for JM that make this true are 7 and -24. The length must be positive, so ...
JM = 7
=153/300
=.51
The probability is .51 or 153/300