# DI Bar Graphs: Stacked Bars

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## DI Bar Graphs: Stacked Bar Graphs

The following chart gives the revenue share of different companies in the tech sector in Cuckooland. :

In 2004, the entire industry added $4bn, of which an increase of$1bn was contributed by COGN, what was the growth rate seen by the entire sector in 2004?

1. 20%
2. 34%
3. 52%
4. Cannot be determined

Choice B

## Detailed Solution

Let 2004 revenues be P and 2003 reveneus be Q.

We know that P – Q = $4bn We also know that 19% of P – 16.9% of Q =$ 1bn.

We need to find ${ \frac{P}{Q}-1 }$ as a percentage.

It is crucial to isolate what you are looking for in these types of questions.

We know that P – Q = $4bn. We also know that 19% of P – 16.9% of Q =$ 1bn.

We know that P – Q = 4(19% of P – 16.9% of Q)

Or P – Q = 0.76P – 0.676Q.

Or, 0.24P = 0.324Q. Or, ${ \frac{P}{Q}=1.35 }$

Overall growth rate = 35%. Correct Answer: Choice B

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