Question

02: A central heating installa
and
maintenance
engineer
reeps a record of the
causes
failure of
system he is callbut to
repair. The cause of failure
classified
as 'gas,
electrical' or in
some
other. A summary of the
records kept of failures
involving
either
gas .
electrical fault is as follows electical yes no gas yes no 53/23 no11/13​

Answer 1

Answer:

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