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at the end of the conference the 10 people present all dhake hands with each other once. how many hands will there be altogether? |
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Answer» Answer: 45 Step-by-step explanation: first think that the first person will only be SHAKING with 9 persons and the second with 8 third one WITH7 fourth one with 6 fifth one with 5 sixth on with 4 seventh one with 3 eighth one with 2 and nineth one with 1 no just add these numbers 9+8+7+6+5+4+3+2+1=45 |
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