AP EAMCET · Maths · Probability
Nine balls one drawn simultaneously from a bad containing white and 7 black balls. The probability of drawing white and black balls is
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
Out of 12 balls we have to draw 9 balls. Therefore, selecting 9 balls from 12 balls can be done in nS=C912 ways =12!9!×3!=220 Now, number of ways for selecting 3 white balls will be =C35=5!3!×2!=10 Number of ways for selecting 6 black balls will be…
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