See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

∵ 13 12 11 2 23 22 21 33 32 31 a a a B I and AB a a a a a a            and 3 5 19 AB AB AB , AB          3 5 19 31 22 13 trace AB AB AB AB 210 10 a a a 210           ∴ 31 22 13 a a a 21    ∴ number of ordered triplets   31 22 13 a ,a ,a 190 