Some question: The average of seven numbers is 18. The average of first three numbers is 14 and the average of last three numbers is 23. What is the middle number?\nOptions:\n(A) 25\n(B) 27\n(C) 15\n(D) 32\n(E) 34
Some stream of consciousness:
User
The total of seven numbers = 7X18 = 126\nThe total of first 3 and last 3 numbers is = 3 X 14+3 X 23 = 111\nSo, the middle number is (126 - 111 ) = 15 The answer: (C).
Assistant