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Mathematics, 16.10.2020 18:01 austinwst3
One- fourth of all telephones at the office have built-in speaker phones. One- half the phones with the built-in speaker phones have conference-call capability. How many of the phones in the office have both a speaker phone and conference-call capability?
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One- fourth of all telephones at the office have built-in speaker phones. One- half the phones with...
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