The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by 1 kg. What was the teacher’s weight?
A. 86 kg B. 64 kg C. 72 kg D. 84 kg Answer: Option AShow Answer
Solution(By Apex Team)
Average weights of 21 boys = 64 kg
Total weights of 21 boys
= 64 × 21
= 1344 kg
The weight of the teacher was added then average increase by 1 kg
⇒ Total weight of teacher and 21 boys
= 65 × 21
= 1430 kg
∴ Weight of teacher
= 1430 – 1344
= 86 kg
Related Questions On Average
Ajit has a certain average for 9 innings. In the tenth innings, he scores 100 runs thereby increasing his average19 people went to a hotel for combine dinner party 13 by 8 runs. His new average is:
A. 20B. 21
C. 28
D. 32
Find the average of all the numbers between 6 and 34 which are divisible by 5.
A. 18B. 20
C. 24
D. 30
In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son?
A. 10 yearsB. 10.5 years
C. 11 years
D. 12 years
If the arithmetic mean of 0, 5, 4, 3 is a, that of -1, 0, 1, 5, 4, 3 is b and that of 5, 4, 3 is c, then the relation between a, b, and c is.
A. a = b = cB. a : b : c = 3 : 2 : 4
C. 4a = 5b = c
D. a + b + c = 12
HI 
EN