If you use 3 rows, your winning ratio is 3:4 (75%), so you have the highest chance to win something.. as oppose to 1:4 (25%) with 1 row... unless the slot machine is fixed, using 3 rows is the way to go.
@calvin
If I counted correctly, the odds of winning are more like 58% on three tickets and if the singular line had a 25% chance of winning. But you're correct about more lines giving better odds.
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