A bag contains 4 blue, 3 black and 5 yellow balls. At random two balls are drawn from the bag. The probability that both drawn balls are of same colour is :एक थैले में 4 नीली, 3 काली तथा 5 पीली गेंदें हैं। थैले में से यादृच्छिक रूप से कोई भी दो गेंदें निकाली जाती हैं, दोनों गेंद एक ही रंग की होने की प्रायिकता है :
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Correct answer: A. 19/66
Explanation
Total balls = 12, so total ways = C(12,2) = 66. Same colour: C(4,2) + C(3,2) + C(5,2) = 6 + 3 + 10 = 19. Probability = 19/66.कुल गेंदें = 12, अतः कुल तरीके = C(12,2) = 66। एक रंग की: C(4,2) + C(3,2) + C(5,2) = 6 + 3 + 10 = 19। प्रायिकता = 19/66।More Mathematics & Numerical Ability questions
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