Help Please!
You and two friends are out running. You pass a group of five other runners. Each person in each group greets each person in the other group. How many greetings are there?

Question

Help Please!
You and two friends are out running. You pass a group of five other runners. Each person in each group greets each person in the other group. How many greetings are there?

anonymous · Answer

I thought the answer would be 10 but I must've done something wrong because it wasn't.

anonymous · Answer

Never mind I figured it out. It's 20. Because 5 of the runners greet each runner which is the 2 then the 2 runners greet the 5 runners.

babynini · Answer

hmm. There are 5 people, each greeting five people.
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babynini · Answer

How many greetings is that? for this first group.

anonymous · Answer

Ahh wait it says you and 2 friends so wouldn't it be 3 runners and they pass the 5 runners?

babynini · Answer

ooh! sorry I misread the question.  I thought it was five people passing 5 -.- sowiee

unknownunknown · Answer

This is just basic multiplication. Group A has 3 runners (you and 2 friends), group B has 5 runners. There are 3*5 = 15 possible combination for greeting.

anonymous · Answer

Lol it's cool but I think I see my mistake now. Thanks for your help :)

anonymous · Answer

Thank you both I appreciate the help! :D And yes now I see it would be 15.