The average weight of an apple in a sample of 10 apples was calculated as 104 g. Later on, it was found that the weighing had shown the weight of each apple 20 g less. The correct average weight of an apple in that sample is:
Given:
The average weight of an apple in a sample of 10 apples was calculated as 104 g.
It was later found that each apple was weighed 20 g less than the actual weight.
Solution:
Correct average weight = Calculated average weight + 20 g.
The calculated average weight was 104 g.
Since each apple was 20 g less, we add 20 g to the calculated average:
Correct average weight =104 + 20 =124 g.
The correct average weight of an apple is 124 g.
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Suggested Test Series
Suggested Test Series
The average of 11 results is 61. If the average of the first 6 results is 64 and that of the last 6 is 61, find the 6th result.
In a group of fifty students, the average score is 70 . If the average score of 30 boys is 75, then find the average score of the 20 girls.
Let five odd consecutive natural numbers are P,Q,R,S and T . What is their average ？
The average of three consecutive odd numbers is 43 . What is the average of smallest and largest of these numbers ?
The sum of nine consecutive natural numbers is 2088 . The average of prime numbers among these 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 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).
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 ?
The average weight of the girls in a group is 58 kg. When 5 girls of average weight 60 kg leave the group or 5 girls of average weight 55.5 kg join the group, the average weight of girls in both cases is equal. What is the number of girls, initially, in the group?
The average of first 148 odd natural numbers, is:
