Join ExamsbookAnswer : 4. "40"
Maths Challenge5
Q: Maths Challenge
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Answer : 4. "40"
Explanation :
Answer: D) 40 Explanation: To get a pair of black rings 100 percent certain 27 blue + 17 red + 2 black = 40 rings should be taken out Then only we can get 100 % a pair of black rings.