W ciagu godziny n gospodyn pomaluje p pisanek . Ile gospodyn pomaluje p' pisanek w tym samym czasie ?
a)p/np'
b)np'/p
c)pp'/n
d)npp'
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ng pomaluje p
xg pomaluje p' mnozymy "na krzyz"
pxg= ngp' /:pg
x=np'/p
odp. b)