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A box contains 27 marbles some are blue and others are green. If a marble is drawn at random from the box, the probability that it is blue is 1/3. Then how many number of green marbles in the box?
  • a)
    10
  • b)
    15
  • c)
    14
  • d)
    18
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
A box contains 27 marbles some are blue and others are green. If a mar...
Blue marble – x
xc1/27c1 = 1/3
x/27=1/3 → x=27/3=9
No of green marbles = Total – Blue marble =27-9=18
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Most Upvoted Answer
A box contains 27 marbles some are blue and others are green. If a mar...
Blue marble – x
xc1/27c1 = 1/3
x/27=1/3 → x=27/3=9
No of green marbles = Total – Blue marble =27-9=18
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Community Answer
A box contains 27 marbles some are blue and others are green. If a mar...
Blue marble – x
xc1/27c1 = 1/3
x/27=1/3 → x=27/3=9
No of green marbles = Total – Blue marble =27-9=18
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A box contains 27 marbles some are blue and others are green. If a marble is drawn at random from the box, the probability that it is blue is 1/3. Then how many number of green marbles in the box?a)10b)15c)14d)18Correct answer is option 'D'. Can you explain this answer?
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