Problem

17 There are 3 cinemas A,B and C.
The mean number of seats per cinema is 380
There are 350 seats in cinema A.
There are 250 seats in cinema B.
Work out the number of seats in cinema C.

Answer

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Answer

540

Steps

Step 1 :Total number of seats = Mean number of seats per cinema * Total number of cinemas = 3803=1140

Step 2 :Number of seats in cinema C = Total number of seats - (Number of seats in cinema A + Number of seats in cinema B) = 1140(350+250)=540

Step 3 :540

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