A box contains 40 identical discs which are either red or white if probably picking a red disc is 1/4. Calculate the number of; 1. White disc. 2. red disc that should be added such that the probability of picking a red disc will be 1/4
The wording in this question is off... I am assuming you’re asking for the number of white discs and red discs if the probability of picking a red disc is 1/4. If the probability of picking a red disc is 1/4, there are 10 red discs and 30 white discs.
