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Basic Mathematics
QUESTION #7956
Question 1
A zoo has some lions and some parrots. The keeper counted 15 heads and 50 legs. How many lions were there?
Correct Answer Explanation
Let lions \(= l\), parrots \(= p\).
\(l + p = 15\) and \(4l + 2p = 50\)
From first: \(p = 15 - l\)
Substituting: \(4l + 2(15-l) = 50 \Rightarrow 2l = 20 \Rightarrow l = 10\)
\(l + p = 15\) and \(4l + 2p = 50\)
From first: \(p = 15 - l\)
Substituting: \(4l + 2(15-l) = 50 \Rightarrow 2l = 20 \Rightarrow l = 10\)
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