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& Dinections: Informationgathered based on observationsof readers of these newspapersA, 8 and 26% peoplereadneauepaper A, 25% people readnewspaper B, 148 people readnewspaper C, 11 people neadboth newspapers A and B 10%.people read both newspapersB and C, at people nead bothA and C and 0% peopleс.0 What is the anesspaperread only newspaperofovenageReaders of all newspapers?What is the average of peoplewho nead both & and B newspaperbut not readnewspaper? (2) What is the average numberof readers who stand at leastcone newspaper? |
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Answer» out of 100, 8 people don't read the news paper So 100- 8 = 92 read the paper Out of 92 , cardinal number of each set has been shown in the image We can APPLY the formula directly n(A U B U C) = n(A) + n(B)+ n(C)- {n(AUB)+ n(BUC)+ n(CUA) - n(A n B nC)} => 92 = 42+51+68 - {30+28+36 - K } => 92 = 161 - {94 - K } => 92 = 67 + K => K = 25 => 25 read all three papers |
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