Bar Graph Questions for CAT

Bar Graph Questions for CAT:

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Instructions:

For the following four questions: Answer the questions on the basis of the information given below.

Purana and Naya are two brands of kitchen mixer-grinders available in the local market. Purana is an old brand that was introduced in 1990, while Naya was introduced in 1997. For both these brands, 20% of the mixer-grinders bought in a particular year are disposed off as junk exactly two years later. It is knows that 10 Purana mixer-grinders were disposed off in 1997. The following figures show the number of Purana and Naya mixer-grinders in operation from 1995 to 2000, as at the end of the year.

Question 1:

How many Naya mixer-grinders were purchased in 1999?

A. 44

B. 50

C. 55

D. 64

Question 2:

How many Naya mixer-grinders were disposed off by the end of 2000?

A. 10

B. 16

C. 22

D. Cannot be determined from the data

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Question 3:

How many Purana mixer-grinders were disposed off in 2000?

A. 0

B. 5

C. 6

D. Cannot be determined from the data

Question 4:

How many Purana mixer-grinders were purchased in 1999?

A. 20

B. 23

C. 50

D. Cannot be determined from the data

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Solutions:

1) Answer (B)

There were 30 naya mixture in 97′ which will also work in 98′
,thus we have 50 new mixtures in 98′ . Now in 99′ 20% of 30
i.e. 6 are thrown in junk . So in 99′ we have 24 + 50 = 74
naya mixtures of previous years. So naya mixture grinder
purchased in 99′ is 124-74 = 50. Hence option b.

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2) Answer (B)

Number of Naya mixer-grinders were disposed off by the end
of 1999 are 6 and at the end of 2000 are 10. So in total 16
naya mixer disposed off.

3) Answer (D)

Since 10 purana were disposed off in 1997, it means 50 new
have been bought in 1995, which implies that 70 were
already in use. The breakup of 70 purana cannot be
determined. So the number of purana disposed in 2000
cannot be calculated.

4) Answer (A)

Purana mixer-grinders were purchased in 1999 = 236 – 222 +Disposed in 1999
= 236-222 + 20%(Purana mixer-grinders were purchased in 1997)
= 236 – 222 + 20%(182 – 162 + 10) = 236- 222 + 6 = 20.
Hence option D.

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