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The mean and the range of the set of numbers: 1.20, 1.00, 0.90, 1.40, 0.80,...

Mathematics
NECO 2002

The mean and the range of the set of numbers: 1.20, 1.00, 0.90, 1.40, 0.80, 0.80, 1.20 and 1.10 are p and q respectively. What is the value of p ÷ q?

  • A. 1.11
  • B. 65
  • C. 1.85
  • D. 2.45
  • E. 3.85
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Correct Answer: Option C
Explanation

Mean of 1.20, 1.00, 0.90, 1.40, 0.80, 0.80, 1.20 and 1.10 

→ \(\frac{8.4}{8}\) = 1.05 → p

Range = 1.40 - 0.80 = 0.60 → q

p ÷ q = 1.05 ÷ 0.60 

= 1.75


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