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1. If ab-2cd = p; 6cd-3ab=1; what is the value of p?
- A. -3
- B. -3
- C. -3
- D. -3
Answer: Option B
Explanation:
Given That ,
6cd - 3ab = 1
⇒ 3(2cd - ab) = 1
⇒ 2cd - ab = 1/3
another equation is,
ab - 2cd = p
⇒ -1(2cd - ab)= p
⇒ -1/3 = p (putting the value of 2cd - ab)
Ans: P = -1/3
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