a box contains 18 ball's out of which X are blue and others in red colour.the number of red balls is half the number of blue balls.what is the probability that a ball drawn at random is blue?
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Answer:
There are 12 blue balls and 6 red balls.
Step-by-step explanation:
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The probability that the ball drawn at random from the bag is a blue ball = 2/3
Let the number of blue balls be x and the number of red balls are x/2 (half the number of blue balls).
Total number of balls = 18
=> x + x/2 = 18
=> x = 12
x/2 = 6
Number of red balls = 6
Number of blue balls = 12
Probability of drawing a blue ball from the bag = 12/18
= 2/3
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