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Mathematics for IGCSE & O level - Proportion (Section 1 - No. 37)
If *a* varies inversely with *b*, and *a* = 3 when *b* = 4, find *a* when *b* = 6.
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a=k/b, 3=k/4, k=12, a=12/b; a=12/6=2.
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