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9 പേരടങ്ങുന്ന ഒരു സംഘത്തിലെ എല്ലാവരും പരസ്പരം ഹസ്തദാനം ചെയ്താൽ ആകെ എത്ര ഹസ്തദാനം നടന്നിരിക്കും ?

A36

B81

C72

D38

Answer:

A. 36

Read Explanation:

ആകെ ഹസ്തദാനം = n(n -1)/2 = 9(9-1)/2 = 9 × 8/2 = 9 × 4 = 36


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