 
 <translate> Onum lake has 25 trout + 75 = 100 fish. Riddle Pond has 1 / 2 * 100 fish in Onum lake = 50 fish. Combined the three bodies of water have 100 fish + 50 fish + 75 fish = 225 fish. The average number of fish in the bodies of water is 225 fish / 3 = 75 fish.
Therefore, the answer is 75. <hau> Tafkin Onum yana da kifi 25 + 75 = kifi 100. Riddle Pond yana da kifi 1 / 2 * 100 a cikin tafkin Onum = kifi 50. Haɗe jikin ruwa uku suna da kifi 100 + kifi 50 + kifi 75 = kifi 225. Matsakaicin adadin kifi a jikin ruwa shine kifi 225 / 3 = kifi 75. Saboda haka, amsar ita ce 75. 