This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
Here are the solutions to your questions: 1. Survey of Youths Let I be the set of youths who liked iPhone and A be the set of youths who liked Android. Total youths surveyed = 80. Number of youths who liked other types of phones = 10. Number of youths who liked both iPhone and Android, n(I A) = 10. Number of youths who liked iPhone or Android or both, n(I A) = Total youths - Youths who liked other types = 80 - 10 = 70. The ratio of the number of youths who liked iPhone only to the number of youths who liked Android only is 3:2. Let n(I