Every staff in an office owns either a Mercedes and/or a Toyota car. 20 own...

WAEC 2008

Every staff in an office owns either a Mercedes and/or a Toyota car. 20 own Mercedes, 15 own Toyota and 5 own both. How many staff are there in the office?

A. 25
B. 30
C. 35
D. 45

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Correct Answer: Option B

Explanation

M = Mercedez; T = Toyota

Number of staff = 0 + (20 - 5) + (15 - 5) + 5

0 + 15 + 10 + 5 = 30

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Every staff in an office owns either a Mercedes and/or a Toyota car. 20 own...

Correct Answer: Option B

Explanation

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