Sum of the squares of 3 no. is 252 and the sum of their products taken two at a time is 116. Find the sum?  Select:
A) 24  B) 33  C) 22  D) 20  E) 21
(a + b + c)2 = a2 + b2 + c2 + 2(ab +bc + ca) = 252 + 2* 116   a + b + c = âˆš484 = 22   Answer 22
<result>C</result>
Sum of the squares of 3 no. is 252 and the sum of their products taken two at a time is 116. Find the sum?