Respuesta :
Step-by-step explanation:
is this a trick question ?
because taking the question fully literally, the answer is 189 kWh.
as he consumed 189 kWh so far (from the beginning, when the meter was installed).
or did you miss to mention the extra part of the question that asked about how many kWh he used during the last month ?
in that case the answer is
189 - 146 = 43 kWh