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Study the following line graph carefully and answer the questions given below:

Percent Profit Earned By Companies A and B Producing Electronic Goods Over The Years.

Profit Earned = (Total Income) - (Total Investment in the Year)

2622021564_line graph 10.JPG

If the amounts invested by the two companies in 2005 were equal, what was the ratio of the total income of Company A to that of B on 2005?

A) 31:33

B) 33:31

C) 34:31

D) 14:11

E) None of these

Option C

Let the investment of each in 2005 be x.

Then (Income of A) : (Income of B)

= (x + 70% of x) : (x + 55% of x)

'.' Income = (Investment) + (Profit)

= $\left(x + \frac{70x}{100}\right) : \left(x +\frac{55x}{100}\right)$

= $\frac{17x}{10} :\frac{31x}{20}$ = 34:31

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