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Magoosh - 数学PS - 129
If the average (arithmetic mean) of a and b is j, and the average of c, d, and e is k, what is the average of a, b, c, d, e and j ?
  • A$${2k+3j}\over{6}$$
  • B$${k+2j}\over{3}$$
  • C$${k+j}\over{2}$$
  • D$${2k+3j}\over{5}$$
  • E$${k+2j}\over{4}$$
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正确答案: C

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