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1/5 - kotki
2/5 *1/4 =2/20 =1/10 slonie
1-(2/5 +1/5 +1/10)=1-(4/10 +2/10 +1/10) =1 -7/10 =3/10 malpki
malpki to 3/10 zbioru
1/5 kotki
1/4*2/5 słonie
reszta - małpki
Odp. Małpki stanowiły 3/10 zbioru