Asked by anthony

brett is having a party .first guest arrived by himself,3 guests then arrive together,each successive group arrives with 2 more guests than the group that entered previously.How many guests will have arrived when the twentieth group enters the room? please explain, thanks
Answered by Ms. Sue
Anthony/Nicky/Jade/Karen -- please use the same name for your posts.

I've helped you with several problems. Now it's your turn.

I'll be glad to check your answer.
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