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Last Activity: 7 Years ago
twelve said that it was not the case that they watched television but did not listen to radio means n of A intersection B` of whole complement =12 for nine people, it is not the case that they did not watched television and do not listen to radio means number of A` intersection B` the whole complement =9seven people either watch television or radio but do not do both. Now let A be the number of people that listen radio means n of A Union B - n of A intersection B=7Now use de`morgans law to solve and put it in the third equation you will get answer 2