Will surveyed students at his school about whether they have ever gone snowboarding and whether they own a skateboard. He found
that 35 of the 99 students who own a skateboard have snowboarded. Also, there were 13 students who have snowboarded but do not own a skateboard, and 147 students who have never gone snowboarding and do not own a skateboard.
2 answers:
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Because there's one 3 & four 7's .
Because there are two 2's & four 9's