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Read the information given below and answer the 3 associated questions.
During 2015-2019, the revenues of four companies P-S were as follows:
It was discovered later that one of the companies misreported its revenue of one of the years. If the misreported revenue is replaced by the correct revenue, the revenues of that company over the five-year period will be in an arithmetic progression. The company that misreported its revenue was
Let us observe the revenue of the four companies over four years. We see that Company Q and Company R can form an arithmetic progression. This is because the differences between revenues over the years are different, and we are only looking to replace one value over five years to achieve an arithmetic progression.
Looking at Company P, we see that it maintains a +25 over the years except for one year. If 2018 revenue was 225, then we would achieve an arithmetic progression.
Similarly, for Company Q, we see that it maintains a +20 over the years except for one year. If 2018 revenue were 160, then we would achieve an arithmetic progression.
