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The number lock has 4 wheels each labelled with 10 digits from 0 to 9. Ncert solution for permutation and combinations of class. Cbse notes class 11 maths pdf ncert solutions pdf newer post older post home. The lock can be opened if 4 specific digits are arranged in a particular sequence with no repetition. Answer in the word daughter, there are 3 vowels namely, a, u, and e, and 5 consonants. Ncert solutions class 11 maths permutations and combinations.
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