Average Practice Question and Answer
8 Q: of the three numbers, the first is 3 times the second and the third is 5 times the first. If the average of the three numbers is 57, the difference between the largest and the smallest number is:
1951 05dcb9ebfe9d33d6509be08aa
5dcb9ebfe9d33d6509be08aa- 19false
- 218false
- 3126true
- 4135false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "126"
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:
1934 05f2a90a3a5ce9779bd29b969
5f2a90a3a5ce9779bd29b969- 116true
- 214false
- 320false
- 418false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "16 "
Q: Ram has 5 daughters. The average age of these 5 sisters is 28 years. The youngest one is 16 years old. What was the average age of the 4 daughters before the youngest one was born?
1932 05df9b6a87c41ef1d193367c5
5df9b6a87c41ef1d193367c5- 128 yearsfalse
- 215 yearstrue
- 331 yearsfalse
- 416 yearsfalse
- 520 yearsfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "15 years"
Q: The average per day income of A, B and C is Rs. 450. If the average per day income of A and B be Rs. 400 and that of B and C be Rs. 430, the per day income of B is:
1928 05dcba2f445ad6b59c82d8685
5dcba2f445ad6b59c82d8685- 1Rs . 300false
- 2Rs . 310true
- 3Rs. 415false
- 4Rs . 425false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 2. "Rs . 310 "
Q: The mean of 14 observations is 11. One more observation is included and the new mean becomes 12. The observation is
1926 05ee05f683f1add232d8330fa
5ee05f683f1add232d8330fa- 120false
- 224false
- 326true
- 428false
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 3. "26 "
Q: Average weight of 10 men increases by 3.5 kg when a man of 50 kg is replaced by a new man what is the age of new person? 1902 05d19d3907619fe30b9d34595
5d19d3907619fe30b9d34595- 185 kgtrue
- 284 kgfalse
- 382 kgfalse
- 480 kgfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "85 kg"
Explanation :
undefined
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:
1899 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
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 4. "$${\left(l+d\over 2 \right)}$$ "
Q: There are 40 boys in a class and average age of the class is 16 years. A boy of 17 years of age is replaced by another one, as a result average age becomes 15.875 years. Find the age of the new boy? 1896 05d19d6201388cd24f0860eff
5d19d6201388cd24f0860eff- 112 yearstrue
- 214.5 yearsfalse
- 315 yearsfalse
- 417 yearsfalse
- Show AnswerHide Answer
- Workspace
- SingleChoice
Answer : 1. "12 years"
Explanation :
undefined