15535C W06 QUESTION 7 points Which of the following wenn Diagrams austrate (B n

Question

15535C W06 QUESTION 7 points Which of the following wenn Diagrams austrate (B n UD the first one on the left the midde one the last one, on the right none of these QUESTION 8 3 points save Answer A class survey found that 25 students watched television on Monday, 20 an Tuesday, and 16 on Wednesday of those who watched on one of these days, 11 chose Monday only, 7 chose T only, and 6 chose Wednesday only. Every student watched tv on at least one of these days, and 7 students watched on all three If 12 students watched tw on both Monday and Tuesday hoarmany total students are in the class? 61 students are in the class. 43 students are in the class, 35 students are in the class. 39 students are in the class. QUESTION 9 3 points A class survey found that 25 students watched television on Monday 20on Tuesday and 16 on Wednesday Of those who

Explanation / Answer

Solution 7:

(B C ) U D simply means common elements betwee B and C along with all elements of D.

Thus option B. the middle one is the correct answer.

Solution 8:

25+20+16 total days of watching the TV = 61.

11+7+6 watched just one day = 24.

7 watched all three days, so 7*3=21.

We have accounted for 24+21 days of watching = 45.

That leaves 61 - 45 = 16 days of watching by the rest of the class, who each watched 2 days exactly (because everyone watched at least some). 16/2 = 8

So there were 24 one-day watchers, 8 two-day watchers, and 7 three-day watchers. That adds up to 39.

So our answer is Option D.

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