the point P(a, b, c), with reference to (E), lies on the plane 2x + y + z = 1, then the value of 7a + b + c is

Question

Let a, b and c be three real numbers satisfying [a, b, c] [(1, 9, 7), (8, 2, 7), (7, 3, 7)] = [0, 0, 0]

If the point P(a, b, c), with reference to (E), lies on the plane 2x + y + z = 1, then the value of 7a + b + c is 

(A) 0 

(B) 12 

(C) 7 

(D) 6

Answer 1

Answer is (D) 6