college math
posted by Rose .
The odds against WildHorse winning the third race are 11:2. If Molly places a $4 bet on WildHorse to win and WildHorse wins, find Molly’s net winnings
A) $5.50 B) $44 C) $16.50 D) $11 E) $22

The net profit on every $2 is $11.
So if you bet $2 and win you will get your two dollars back plus the eleven. Your net winnings is your gain which is the eleven.
Of course if you bet $4 instead of $2, you will get twice as much. 
How many different fourdigit numbers can be formed from the digits 0 through 9 if the first digit must be even and cannot be zero?