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1. If a + b + c = 12, a + b = 4, and a + c = 7, what is the value of a?
- A. 2
- B. 2
- C. 2
- D. 2
Answer: Option D
Explanation:
দেয়া আছে, a + b + c = 12
⇒ 4 + c = 12
.:. c = 8
আবার দেয়া আছে, a + c = 7
⇒8 + a = 7
.:. a = - 1
⇒ 4 + c = 12
.:. c = 8
আবার দেয়া আছে, a + c = 7
⇒8 + a = 7
.:. a = - 1
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