Rahul purchases only 2 goods: ice cream and chocolates. If own price elasticity of demand for chocolates is 1, what is the cross price elasticity of demand for ice creams? show your calculation/reasoning

When your working with the passage-based reading questions on the psat do all of the following except. a)make sure you read each question throughly. b) try to answer each question before you look at the answers. c) plan to spend most of your time reading the passage. d) make sure your answer choice is the most correct number me