The average of two numbers is P. If one number is Q, then the other number is  Choose the correct choice from the following answers.
A) 2Q	B) 2P	C) P - Q	D) 2P-Q	E) None of these
Explanation :   Let the other number be x,   According to the question,   =&gt; ( x + Q ) / 2 = P.   =&gt; x + Q = 2P.   =&gt; x = 2P - Q.   Hence, the required number is 2P - Q.   Answer : 2P-Q
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The average of two numbers is P. If one number is Q, then the other number is