There are blue, red and green marbles in an urn. If there are 12 blue marbles, the probability of getting a blue marble is 1/2 and probability of getting a red marble is 3/8.how many green marbles are there in the urn?
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Answer:
3
Step-by-step explanation:
Probability of blue= blue|total
Total= 12/ 1/2 = 24
Then,no. Of red = 24× 3/8 =9
So,number if green marbles = 24-12-9=3