1 . A box contains 21 balls numbered 1 to 21 . A ball numbered 1 to 21 . A ball is drawn and then another ball is brawn without replacement . What is the probability that both balls are even numbered?
- A. 2/7
- B. 3/14
- C. 8/21
- D. 5/21
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জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯
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