Sum of the squares of three numbers is 363 and the sum of their products taken two at a time is 131. Find the sum? Choose the correct answer:
A) 20 B) 22 C) 25 D) 27 E) 29
(a + b + c)2 = a2 + b2 + c2 + 2(ab +bc + ca) = 363 + 2* 131   a + b + c = √625 = 25   25
<result>C</result>
Sum of the squares of three numbers is 363 and the sum of their products taken two at a time is 131. Find the sum?