The probability of occurrence of two events A and B are ¼ and ½ respectively. The probability of their simultaneous occurrence is 7/50. Find the probability that either A or B must occur. Share with your friends Share 0 Harshini Padmanaban answered this 0.61 0 View Full Answer Shiladitya De answered this I WAS UPLOADING MY ANS. BUT IT WAS NOT GETTING UPLOADED. SO I HAVE TAKEN A SCREENSHOT OF IT. I have made a mistake with the spelling of know. 0