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A survey of a group's viewing habits over the last year revealed the following information: 4. A survey of a group's Viewing habits over the

A survey of a group's viewing habits over the last year revealed the following information:

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4. A survey of a group's Viewing habits over the last year revealed the following information: 20% watched gymnastics 10% watched tennis 30% watched baseball Those that watched gymnastics are independent of those that watched tennis Those that watched tennis are independent of those that watched baseball Those that watched gymnastics are mutually exclusive of those that watched baseball Calculate the percentage of the group that watched none of the three sports during the last year. (4 marks)

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