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A box contains 5 black and 5 red balls. Two balls are randomly picked one after another from the box, without replacement. The probability for both balls being red is
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1 90 -
1 2 -
19 90 -
2 9
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Correct Option: D
| The probability of drawing a red ball = | 10 |
| If the ball is not replaced, the box will have a ball, so probability of drawing the red ball in next chance = | 9 |
Hence probability of drawing 2 balls
| = | × | = | 10 | 9 | 9 |
