Plated steel sheet, method for manufacturing hot-dip galvanized steel sheet, and method for manufacturing alloyed hot-dip galvanized steel sheet

Provided is a plated steel sheet having a chemical composition including, in terms of mass%, at least 0.03% to 0.70% C, 0.25% to 2.50% Si, 1.00% to 5.00% Mn, 0.100% or less P, 0.010% or less S, 0.001% to 2.500% sol. Al, and 0.020% or less N, with the remainder consisting of iron and impurities, wherein the metal composition thereof includes more than 5.0 vol% residual austenite and more than 5.0 vol% tempered martensite, and the residual austenite has a C content of 0.85 mass% or more.