What were the gross revenues from ticket sales for a certain film during the second week in which it was shown?
(1) Gross revenues during the second week were $1.5 million less than during the first week.
(2) Gross revenues during the third week were $2.0 million less than during the first week.
Sol: Let the revenue during the 2nd week in which it was shown be X. We need to find X
From St 1 we have the Revenue in the first week was which X+1.5
From St 2 we have the revenue in 3rd week was 2M US$ less. Not sufficient.
We don't know what was the revenue in first week.
Combining we get that
Revenue in 1st week: x +1.5
Revenue in 2nd week: x
and Revenue in 3rd week: x +1.5- 2-----> x- 0.5
Clearly we cannot get the value of x.
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