The average of 9 numbers is 17. The average of 7 of these numbers is 16. The average of the remaining two numbers is:
Given:
Average of 9 numbers = 17
Average of 7 of these numbers = 16
Concept Used:
Total Sum = Average × Number of Terms
Remaining Sum = Total Sum – Known Sum
Average =
Solution:
Total sum of 9 numbers = 9 × 17 = 153
Sum of 7 numbers = 7 × 16 = 112
Sum of remaining 2 numbers = 153 – 112 = 41
Average of remaining 2 numbers = 41 / 2 = 20.5
The average of the remaining two numbers is 20.5
English
100 Questions
100 Marks
90 Mins English English100 Questions100 Marks90 Mins English English100 Questions100 Marks90 Mins EnglishThe average of the squares of the first 83 natural numbers is
The average of the squares of the first 82 natural numbers is
The average price of three items of furniture is ₹5045. If their prices are in the ratio 3:5:7, the price of the costliest item (in ₹) is
The average (rounded off to two decimal place) of the squares of the first 84 natural numbers is
The average weight of Shivam, Rupesh and Mandar is 45 kg. If the average weight of Shivam and Rupesh is 38 kg and the average weight of Rupesh and Mandar is 50 kg, then find Rupesh's weight (in kg).
A grocer has a sale of Rs.6635, Rs.7127, Rs.7055, Rs.7430 and Rs.6462 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs.6700? (In Rs.)
In a class, the number of boys is 40% more than that of girls. In an examination, the average marks obtained by boys is 20% less than the average marks obtained by girls. If the average marks obtained by all the boys and girls is 53, then what is the average marks obtained by the boys ?
Suggested Test Series
Suggested Test Series
