CAT Quantitative Ability Questions | CAT Permutation, Combination and Probability questions

CAT/2002

Question . 40

If there are 10 positive real numbers n1 < n2 < n3 ... < n10. How many triplets of these numbers (n1, n2, n3), (n2, n3, n4), ... can begenerated such that in each triplet the first number is always less than the second number, and the second number is always lessthan the third number?

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