The average of seven numbers is 4. The average of first three numbers is 2 and the average of last three numbers is 6. What is the middle number?\nOptions:\n(A) 3\n(B) 4\n(C) 6\n(D) 7\n(E) 8 Think first, then make a decision. Some random thoughts:
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The total of seven numbers = 7X4 = 28\nThe total of first 3 and last 3 numbers is = 3 X 2+3 X 6 = 24\nSo, the middle number is (28 - 24 ) = 4 So the answer is (B).
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