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What is the average number of people register for workshop from Chennai, Hyderabad and Delhi?
1750
1285
1459
1432
None of the above
1750
Sum the last two digits of the numbers (50 + 00 + 50 = 100), then add the hundreds and thousands; finally, divide the total by 3.
Registrations from Chennai = 1800, Hyderabad = 2500, Delhi = 950.
Average=Number of Values∑Values
Sum the last two digits of the numbers (50 + 00 + 50 = 100), then add the hundreds and thousands; finally, divide the total by 3.
Students often include all cities from the table instead of strictly following the three cities (Chennai, Hyderabad, and Delhi) mentioned in the question.
Identify required values
Extract the registration numbers for the specified cities from the table: Chennai = 1800, Hyderabad = 2500, and Delhi = 950.
Sum=1800+2500+950
Calculate the sum
Add the registration counts together: 1800+2500=4300, and 4300+950=5250.
Sum=5250
Calculate the average
Divide the total sum by the number of cities (3) to find the average.
Average=35250=1750
A is correct because the sum of registrations for Chennai, Hyderabad, and Delhi is 5250, which when divided by 3 results in 1750.
This concept of finding the average is frequently tested in 'Average Speed' and 'Weighted Average' problems in Quant sections.
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