The average temperature of first three days of the week is $$23^\circ C$$; the average temperature of next three days is $$24^\circ C$$ and the average temperature of whole week is $$23.5^\circ C$$. The temperature on the last day of the week is:
given that average temperature of first 3 days is 23
sum of temperature= 23$$\times\ $$69
=69
also given that average temperature of next 3 days is 24
so sum=24$$\times\ $$3
=> 72
also given that average temperature of the whole week is 23.5
so,sum=7$$\times\ $$23.5
=> 164.5
to find the temperature on last day
164.5-(72+69)
=>164.5-141=23.5
hence answer is option c
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