Let $a \geq b \geq c \geq 0$ be integers such that $2 ^ { a } + 2 ^ { b } - 2 ^ { c } = 144$. Then, $a + b - c$ equals: (A) 7 (B) 8 (C) 9 (D) 10 .
Let $a \geq b \geq c \geq 0$ be integers such that $2 ^ { a } + 2 ^ { b } - 2 ^ { c } = 144$. Then, $a + b - c$ equals:\\
(A) 7\\
(B) 8\\
(C) 9\\
(D) 10 .