Sum of the squares of three numbers is 267 and the sum of their products taken two at a time is 131. Find the sum?  Pick one.
A) 20	B) 25	C) 26	D) 23	E) 29
(a + b + c)2 = a2 + b2 + c2 + 2(ab +bc + ca) = 267 + 2* 131   a + b + c = √529 = 23   23
<result>D</result>
Sum of the squares of three numbers is 267 and the sum of their products taken two at a time is 131. Find the sum?