Jenny has played Mark 10 times, and since mark has only won once she's had 10-1=<<10-1=9>>9 wins.
Jenny has played Jill twice as many times as Mark, so they've played 10*2= <<10*2=20>>20 games
Of the 20 games Jenny and Jill have played, Jill has won 75% of them so she's had 20*.75= <<20*.75=15>>15 wins
If Jill has won 15 games, that means Jenny won 20-15=<<20-15=5>>5 games
For Jenny's total wins, her wins against Mark and Jill are added together for 5+9=<<5+9=14>>14 wins
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