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Question

Mathematics Question on Percentage

Shatabadi Express has a capacity of 500 seats of which 10%\% are in the Executive Class and the rest being Chair Cars. During one journey, the train was booked to 85%\% of its capacity. If Executive Class was booked to 96%\% of its capacity, then how many Chair Car seats were empty during that journey?

A

75

B

73

C

71

D

None of these

Answer

73

Explanation

Solution

The correct option is (B): 73
To find how many Chair Car seats were empty during the journey, we can follow these steps:

1. Determine the number of Executive Class and Chair Car seats:
- Total seats: 500500
- Executive Class seats: 10%10\% of 500=0.10×500=50500 = 0.10 \times 500 = 50
- Chair Car seats: 50050=450500 - 50 = 450

2. Calculate the total booked seats:
- The train was booked to 85%85\% of its capacity:
Total booked seats=85%×500=0.85×500=425\text{Total booked seats} = 85\% \times 500 = 0.85 \times 500 = 425

3. Calculate the booked Executive Class seats:
- Executive Class was booked to 96%96\% of its capacity:
Booked Executive Class seats=96%×50=0.96×50=48\text{Booked Executive Class seats} = 96\% \times 50 = 0.96 \times 50 = 48

4. Determine the booked Chair Car seats:
- Total booked seats are 425425, and the booked Executive Class seats are 4848:
Booked Chair Car seats=42548=377\text{Booked Chair Car seats} = 425 - 48 = 377

5. Calculate the empty Chair Car seats:
- Total Chair Car seats are 450450:
Empty Chair Car seats=450377=73\text{Empty Chair Car seats} = 450 - 377 = 73

Thus, the number of empty Chair Car seats during that journey is 73.