Average Practice Question and Answer
8Q: The average salary of all employees working in an office is Rs.8000. The average salary of 7 technicians is Rs 12000 and the average salary of rest of the workers is Rs.6000. The total no. of workers working in that office is- 2459 05d19f5821388cd24f08614e7
5d19f5821388cd24f08614e7- 120false
- 221true
- 323false
- 422false
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Answer : 2. "21"
Explanation :
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Q: The average of 12 number is 42. If a 13th number is added, then the average becomes 44. What is the 13th number?
2454 05eb94bda43b27164c8e427e7
5eb94bda43b27164c8e427e7- 168true
- 272false
- 370false
- 474false
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Answer : 1. "68"
Q: Rohit purchased 12 kg of oranges for a total price of ₹480 and 18 kg of guavas at 30 per kg. What cost of the fruits purchased by Rohit?
2433 064225cba2b960e1a4180e2bf
64225cba2b960e1a4180e2bf- 136.00false
- 234.00true
- 337.20false
- 438.20false
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Answer : 2. "34.00"
Q: The average marks of a student in four subjects is 75. If the student obtained 80 marks in the 5th subject then the new average is ?
2410 05f6346b3167e402436a7a682
5f6346b3167e402436a7a682- 180false
- 276true
- 392false
- 495false
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Answer : 2. "76"
Q: Average age of 21 men reduces by 1 year when a man of 32 years is replaced by a child. What is the age of that child? 2387 05d19d5011388cd24f0860efa
5d19d5011388cd24f0860efa- 110 yearsfalse
- 211 yearstrue
- 39 yearsfalse
- 48 yearsfalse
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Answer : 2. "11 years"
Explanation :
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Q: The average of 10 numbers is calculated as 15. It is discovered later on that while calculating the average one number, namely 36, was wrongly read as 26. The correct average is:
2381 05f2a90a3a5ce9779bd29b969
5f2a90a3a5ce9779bd29b969- 116true
- 214false
- 320false
- 418false
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Answer : 1. "16 "
Q: The mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The observation is
2348 05ee05f683f1add232d8330fa
5ee05f683f1add232d8330fa- 120false
- 224false
- 326true
- 428false
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Answer : 3. "26 "
Q: a, b, c, d, e, f, g are consecutive even numbers. j, k, l, m, n are consecutive odd numbers. The average of all the numbers is:
2346 05f2a63d3cef453383f1e3e14
5f2a63d3cef453383f1e3e14- 1$${\left(a+b+m+n\over 4 \right)}$$false
- 2$${\left(j+c+n+g\over 4 \right)}$$false
- 3$$3{\left(a+n\over 2 \right)}$$false
- 4$${\left(l+d\over 2 \right)}$$true
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