AP Police Constable Prelims 6-Nov-2016 Solved Paper
© examsiri.com
Question : 42 of 200
Marks:
+1,
-0
A bag contains 4 red and some black balls. A ball is picked from the bag at random. If the probability of it being a black ball is twice that of a red ball, then the number of black balls in that bag is:
Go to Question: