During the analyses of assignment 1 and assignment 2 of RSK4803, the assessors found the following: 70% of students passed assignment 1. 45% of students passed assignment 2. 30% of students passed both assignments. Question Calculate the total number of students who passed all assignments, if there are 800 students who are registered for the module but only 600 submitted assignment 1 and 500 submitted assignment 2. a. b. c. d. a. 645 b. 420 c. 350 d. 225