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Sagot :

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Answer:

5. How many people were surveyed?

Ans: 47

Sol: 10+15+8+2+4+5+3 = 47

6. How many buy samsung and huawei?

Ans: 5 (as seen on the diagram)

7. How many buy both huawei and nokia but not samsung?

Ans: 3 (as seen on the diagram)

8. How many buy huawei or nokia but not samsung?

Ans: 23

Sol: 8 + 15 = 23

9. How many buy samsung or huawei?

Ans: 25

Sol: 10+15 = 25

10. How many buy Nokia, Samsung, and Huawei?

Ans: 4 (as seen on the diagram)