 
<translate> Tambayar ita ce: Wani malami ya gaya wa Adelaide, Ephraim, da Kolton su sayi agwagwa kuma su lura da yadda suke girma da kuma halayensu don a koyar da su kimiyya. Adelaide ta sayi ducks sau biyu fiye da Ephraim, yayin da Ephraim ya sayi ducks 45 fiye da Kolton. Idan Adelaide ta sayi ducks 30, menene matsakaicin adadin ducks da uku suka saya? Tsarin tunani mataki-mataki: Idan Adelaide ta sayi ducks 30, Ephraim ya sayi ducks 30 / 2 = ducks 15. Tun da yake Ephraim ya sayi ducks 45 fiye da Kolton, Kolton ya sayi ducks 45 + ducks 15 = ducks 60. Adadin ducks da uku suka saya shine ducks 60 + ducks 15 + ducks 30 = ducks 105. Matsakaicin adadin ducks kowane saya ne 105 ducks / 3 mutane = 35 ducks / mutum. <eng> The question is: A teacher asked Adelaide, Ephraim, and Kolton to buy ducks and monitor their growth patterns and features for their science class. Adelaide bought twice the number of ducks that Ephraim bought, while Ephraim bought 45 fewer ducks than Kolton. If Adelaide bought 30 ducks, what's the average number of ducks the three bought?
Step-by-step reasoning process: If Adelaide bought 30 ducks, Ephraim bought 30 ducks / 2 = 15 ducks. Since Ephraim bought 45 fewer ducks than Kolton, Kolton bought 45 ducks + 15 ducks = 60 ducks. The total number of ducks the three bought is 60 ducks + 15 ducks + 30 ducks = 105 ducks. The average number of ducks each bought is 105 ducks / 3 people = 35 ducks / person.
 