the average salary of teachers of a school was rs. 4000.After the retirement of two teachers the total salary decreased by rs 5000 and the average salary increase by rs 150.then find the present no. of teacher Please solved it by with explanation
Answers
Answer:
Answer: B) 21
Explanation:
Lot the total number of workers be v Then,
8OOOv = (12000 * 7) + 6000 (v - 7) <=> 2000v = 42000 <=> v = 21.
Subject: Average - Quantitative Aptitude - Arithmetic Ability
Related Questions
Q:
The average height of 50 bats is 126 cm. Some bats of average height 120 cm are removed. If the new average height is 130 cm, then how many bats are remaining?
A) 12
B) 20
C) 16
D) 30
View Answer Report Error Discuss
Filed Under: Average - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
2 90
Q:
A man buys 7 shirts at Rs 300 each, 2 trousers at Rs 450 each and 1 pair of shoes at Rs 500 each. What is the average expenditure (in Rs) per article?
A) 210
B) 250
C) 320
D) 350
View Answer Report Error Discuss
Filed Under: Average - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams , CAT
1 129
Q:
What is the average of all the one digit, two digit and three digit natural numbers?
A) 300
B) 500
C) 1000
D) 1250
View Answer Report Error Discuss
Filed Under: Average - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
0 140
Q:
The average height of 40 sticks is 154 cm. Some sticks of average height 160 cm are taken out. If the new average height is 150 cm, then how many sticks are remaining?
A) 12
B) 16
C) 24
D) 28
View Answer Report Error Discuss
Filed Under: Average - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
1 174
Q:
What is the average of all the one digit and two digit natural numbers?
A) 25
B) 40
C) 50
D) 99
View Answer Report Error Discuss
Filed Under: Average - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
1 247
Q:
A boy buys 5 pencils at Rs 3 each, 3 erasers at Rs 2 each and 3 sharpeners at Rs 5 each. What is the average expenditure (in Rs) per article?
A) 3.27
B) 3.5
C) 4
D) 5
View Answer Report Error Discuss
Filed Under: Average - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
3 271
Q:
The average of 10 numbers is X and one of the number is 38. If 38 is replaced with 19, then what will be the new average?
A) X– (1/2)
B) X – (1/19)
C) X – (19/10)
D) X – (19/9)
View Answer Report Error Discuss
Filed Under: Average - Quantitative Aptitude - Arithmetic Ability
Exam Prep: Bank Exams
0 215
Q:
Find the average of first 30 multiples of 7.
A) 94.8
B) 99.6
C) 104.4
D) 108.5