There are $$3$$ boys and $$4$$ girls in a choir. How many ways are there to pick $$1$$ boy and $$1$$ girl as the two lead singers?      Pip\textquotesingle s Answer: There are $$3$$ ways to pick a boy and $$4$$ ways to pick a girl, so there are $$3+4=7$$ ways in total.  $ $  Can you find Pip\textquotesingle s mistake? 
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