In a class of 15 students of which 7 are males, 5 students wear spectacles. There are a male who wear spectacles. Four students are chosen at random. Find the probability thy P) All females are chosen. Equal number of males and females who wear spectacles are chosen. All males chosen if it is known that they all do not wear spectacles. More students who not wear spectacles are chosen if it is known that they are females. All females or students who do not wear spectacles are chosen. 12009