Sum of 4 A.M between 18 and 3 is:

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<p>The arithmetic mean (A.M) between any two numbers a and b is (a+b)/2.</p>
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<p>So, the arithmetic mean between 18 and 3 is:</p>
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<p>(18 + 3)/2 = 21/2 = 10.5</p>
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<p>To find the sum of 4 arithmetic means between 18 and 3, we can use the formula:</p>
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<p>Sum of n A.M = n x A.M</p>
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<p>Substituting the values, we get:</p>
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<p>Sum of 4 A.M = 4 x 10.5 = 42</p>
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<p>Therefore, the sum of 4 arithmetic means between 18 and 3 is 42.</p>
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