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| Q.12 | There are 28 persons present at a press conference. After the conference they all shake hands with each other. If 7 of them refuse to shake hands at all, then how many hands shakes will be there altogether? | |
| Ans | 1. 231 | |
| 2. 378 | ||
| 3. 420 | ||
| 4. 210 |
Correct Ans Provided: 4
