Mathematics
Aditya has a bag containing some black and some white balls. The probability of a randomly chosen ball from this bag being white is . If 5 white balls are added and 5 black balls are removed from the bag, the probability of choosing a white ball changes to . The total number of balls in the bag is: 1. 10 2. 25 3. 45 4. 50
Related Questions
A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball from the bag is thrice that of a red ball, the number of blue balls in the bag is:
10
15
20
25
The probability of getting a defective pen in a lot of 600 is 0.045. The number of defective pens in the lot is :
27
270
36
360