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Ankita sahoo Best Answer
Before reaching Eutectic point only B was crystalized out and i.e 0.31That means in residual liquid 0.31, mineral A liquid is 0.25 and mineral B liquid is 0.31-0.25=0.06 And at Eutectic point both A0.25 & B0.06 crystalize out simultaneously. So, at Eutectic point % of A is, (0.25/0.31)×100= 80.64And %of B at Eutectic is, (0.06/0.31)×100= 19.36