 
 <translate> 1 man's 1 day work = 1/100
(10 men + 15 women)'s 1 day work = 1/4
15 women's 1 day work = (1/4 - 10/100) = 3/20
1 woman's 1 day work = 1/100
1 woman alone can complete the work in 100 days. The answer: (A). <ibo> Ọrụ otu onye rụrụ n'otu ụbọchị = 1/100 (Ndị ikom 10 + ndị inyom 15) 1 ụbọchị ọrụ = 1/4 15 ụmụ nwanyị 1 ụbọchị ọrụ = (1/4 - 10/100) = 3/20 Ọrụ otu nwanyị rụrụ n'otu ụbọchị = 1/100 Otu nwaanyị naanị ya nwere ike ịrụcha ọrụ ahụ otu narị ụbọchị. Azịza ya bụ: (A). 