QUERYS-AGUIRREMONTOYALIZETH-SEC3NM70

select niños, count(*)/(select count(*) from informatica) as probabilidad from informatica where niños in(select distinct niños from niños) group by niños;     select niños, niñas, count(*)/(select count(*) from informatica) as Probabilidad from informatica where niños in(select distinct niños from informatica) and niñas in(select distinct niñas from informatica) group by niños, niños order by niños, niñas;