A person purchases 90 watches and sells 40 watches at a gain…

A person purchases 90 watches and sells 40 watches at a gain of 10% and 50 watches at a gain of 20%. If he sold all of them at a uniform profit of 15%, then he would have got $ 40 less. The cost price of each clock is:

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #45762