Mathematics, 22.11.2020 17:20 Ruby2480

4. a. In a survey of mobile and telephone, it was found that 200 people had telephone, 25 had both, 135 did not have telephone and 300 did not have mobile. I. How many people participated in the survey?
ii. How many people had mobile only?

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4. a. In a survey of mobile and telephone, it was found that 200 people had telephone, 25 had both, 135 did not have telephone and 300 did not have mobile. I. How many people participated in the survey?ii. How many people had mobile only?

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Another question on Mathematics

4. a. In a survey of mobile and telephone, it was found that 200 people had telephone, 25 had both, 135 did not have telephone and 300 did not have mobile. I. How many people participated in the survey?
ii. How many people had mobile only?