CAT Quant Practice Problems

Question: If there are 10 positive real numbers \({n_1} < {n_2} < {n_3}... < {n_{10}},\)how many triplets of these numbers\(({n_1},{n_2},{n_3}),({n_2},{\rm{ }}{n_3},{n_4}),{\rm{ }}...\)can be generated such that in each triplet the first number is always less than the second number, and the second number is always less than the third number?
  1. 45
  2. 90
  3. 120
  4. 180

Correct Option:3

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CAT Quant Practice Problems
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