Asked by Anonymous
A company selling cell phones has a total inventor of 800 phones. Of these phones, 400 are smartphones and 240 are black. If 200 phones are not black and not a smartphones, how many are black smartphones?
Answers
Answered by
Steve
Draw a Venn diagram. It is clear that
800-(400+240-B&S) = 160+B&S = 200
B&S = 40
800-(400+240-B&S) = 160+B&S = 200
B&S = 40