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If Bharat is 17 years old, then which of the following could be the ages of Dinesh and Chandan respectively ?

  • A.18 and 19
  • B.19 and 21
  • C.18 and 20
  • D.18 and 21

Answer: B

Dinesh and Chandan could be 19 and 21.

With Bharat 17, the youngest, Ferguson must be older than Bharat and younger than Dinesh. So Dinesh cannot be 18, since no whole age lies between 17 and 18 for Ferguson. That rules out every option starting with 18.

Dinesh 19 and Chandan 21 works: Ferguson 18, Amit 20 (older than Bharat), Chandan 21 (older than Dinesh) and Eeshwar 22 use every age once.

Options 18 and 19, 18 and 20, and 18 and 21 all leave no room for Ferguson between Bharat and Dinesh.

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