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\[
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n-1 = 14
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\]
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\[
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n = 15
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\]
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There are \(\boxed{15}\) positive 2-digit numbers divisible by 6.
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Question: The number of red balls and yellow balls in a box is in the ratio of \(5:3\). If there are 15 red balls how many yellow balls are there?
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Solution:
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Let the number of red balls be \(5x\) and the number of yellow balls be \(3x\). According to the problem there are 15 red balls so:
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\[
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5x = 15
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