To make green, mix 3 spoons blue and 2 spoons yellow
To make green, mix 3 spoons blue and 2 spoons yellow. Needing more, Sohan says make both 5 and 5, and the same green will come. Will making both equal give the same colour?
Who do you think is right? Pick one.
The answer: No — the colour will change
Why
Sohan wants more paint and 5-and-5 does give more — his instinct to scale up is right. What he missed is that the SHADE lives in the ratio 3:2, not in the totals being big or equal. The green looked that way because blue outweighed yellow, 3 to 2. Making both 5 makes them EQUAL, 5:5 — now there's as much yellow as blue, so a different, more yellowish green. To keep the exact shade you multiply both by the same number: 3:2 becomes 6:4, still the same lean. Adding a flat amount to each changes the balance. Test: doubling a recipe means twice of EACH, keeping the ratio; setting both to one number throws it off. Sohan's not right: equal spoons break the 3:2 balance and shift the colour — scale a ratio by multiplying both sides, not by levelling them.
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