theres this question for sanhyaku but there are two correct choices. i mean, theyre the same choice but the result is different. sometimes its wrong, sometimes its correct. ==
Hi there ^^
There are some questions for which we have more than one correct choice, but in this particular case, I'm afraid the only correct answer is sanbyaku (さんびゃく)...
I don't remember having learnt a pronunciation such as sanpyaku (さんぴゃく) for the "300" number...