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Part ACSIR NET December 2024count-within-and-across-the-two-groups

Count within and across the two groups

In a board meeting of 20 directors, 6 shook everyone else's hands but the remaining 14 did not shake each another's. The total number of handshakes in the meeting was

  1. A.26
  2. B.84
  3. C.99✓ Correct
  4. D.190

You have the answer. Trap Analysis is why the other three were written.

Not a worked solution repeated four times — the specific reasoning error each wrong option was built to reward, and why this one tests execution slip.

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50 are analysed free — try those first.

The trap it tests

Execution slip

The idea was right. The computation was not.

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