A Trixie consists of 4 possible bet combinations involving selections in 3 different events.
The bet includes 3 doubles and 1 treble.
A double is a combination of 2 events and treble is a combination of 3 events.
E.g You place a trixie bet on games A,B and C.
Let's say your stake is N50, please note that your total stake will be 50 X 4 = 200
This is so because your stake is charged separately for each possible combination and winnings are credited for each correct combination as well.
Your combinations would be arranged thus:
3 doubles
A*B X 50 = Winnings 
A*C X 50 = Winnings
B*C X 50 = Winnings
1 Treble
A*B*C X 50 = Winnings
You must get the prediction for at least 2 events correctly for you to get a return.