MPSC Rajyaseva 2025 CSAT — Question 52

एका पिशवीत 4 पांढरे, 3 लाल आणि 6 निळे बॉल आहेत. पिशवीतून यादृच्छिकपणे 3 बॉल काढायचे आहेत. ते सर्व लाल असण्याची शक्यता ________ आहे. A bag contains 4 white, 3 red and 6 blue balls. Three balls are drawn at random from the bag. The probability that all of them are red is ________.

There are 13 balls, so the number of ways to draw 3 is 13C3 = 286, and there is only 3C3 = 1 way to draw all three red balls; the true probability is 1/286, which is not among the options. MPSC's final answer key gives option (3), 2/91, so that is the answer recorded here.