A bag contains 15 white and some black balls if probability of drawing a black ball from the bag is twice that of drawing a white ball find the number of black balls in the bag
Answers
Answered by
0
white=15
let total no of balls=x
p(drawing white) = 15/x
p(drawing black) = 2 × 15/x = 30/x
therefore no of black balls should be 30 and total no of balls = 45
let total no of balls=x
p(drawing white) = 15/x
p(drawing black) = 2 × 15/x = 30/x
therefore no of black balls should be 30 and total no of balls = 45
Similar questions