At the St. Patrick's Day party, sandwiches and drinks were served. Each guest could choose a corned beef. ham, or fish sandwich and coffee, tea, or lemonade. If each guest can have one sandwich and one drink, how many different combinations are there to choose from?

To determine the number of different combinations, we need to multiply the number of sandwich options by the number of drink options.

There are 3 sandwich options: corned beef, ham, or fish.

There are 3 drink options: coffee, tea, or lemonade.

Therefore, the total number of different combinations is 3 x 3 = <<3*3=9>>9.

So, there are 9 different combinations to choose from at the St. Patrick's Day party.

To find the total number of combinations, we need to multiply the number of options for sandwiches by the number of options for drinks.

For sandwiches, there are 3 options: corned beef, ham, or fish.
For drinks, there are 3 options: coffee, tea, or lemonade.

To calculate the total number of combinations, we multiply the number of options for sandwiches by the number of options for drinks:
3 (sandwich options) * 3 (drink options) = 9

Therefore, there are 9 different combinations to choose from.