Sum of the squares of 3 no. is 156 and the sum of their products taken two at a time is 50. Find the sum? Choose the most appropriate option
A) 18
B) 16
C) 19
D) 21
E) 15
(a + b + c)2 = a2 + b2 + c2 + 2(ab +bc + ca) = 156 + 2* 50   a + b + c = âˆš256 = 16   Answer 16
<result>B</result>
Sum of the squares of 3 no. is 156 and the sum of their products taken two at a time is 50. Find the sum?