a box contains 12 balls of which some are blue in colour if 6 more blue balls are put in the box and a ball is drawn at random the probability of drawing a blue ball Doubles then what it was before find the number of blue balls in the bag
Answers
Answered by
1
Answer:
6.....................
Answered by
1
Answer:
Step-by-step explanation:
total balls i.e total outcomes = 12
Number of blue balls = x
p(e) getting blue ball = x/12
new p(e) = x+6/12 = 2(x/12)
= x+6/12 = x/6
= x+6 / 2 = x
= x+ 6 = 2x
= 6 = 2x-x
= x=6
number of blue balls = 6
Similar questions