Mathematics, 11.06.2021 16:10 kekebaby156

A company selling cell phones has a total inventory of 900 phones. Of these phones, 450 are smartphones and 270 are black. If 225 phones are not black and not a smartphone, how many of the phones are black smartphones

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A company selling cell phones has a total inventory of 900 phones. Of these phones, 450 are smartpho...