Average Practice Question and Answer
8 Q: The average of 12 number is 42. If a 13th number is added, then the average becomes 44. What is the 13th number?
1800 05eb94bda43b27164c8e427e7
5eb94bda43b27164c8e427e7- 168true
- 272false
- 370false
- 474false
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Answer : 1. "68"
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:
1794 05dcba2f445ad6b59c82d8685
5dcba2f445ad6b59c82d8685- 1Rs . 300false
- 2Rs . 310true
- 3Rs. 415false
- 4Rs . 425false
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Answer : 2. "Rs . 310 "
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? 1792 05d19d3907619fe30b9d34595
5d19d3907619fe30b9d34595- 185 kgtrue
- 284 kgfalse
- 382 kgfalse
- 480 kgfalse
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Answer : 1. "85 kg"
Explanation :
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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:
1788 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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Answer : 4. "$${\left(l+d\over 2 \right)}$$ "
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:
1768 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
1760 05ee05f683f1add232d8330fa
5ee05f683f1add232d8330fa- 120false
- 224false
- 326true
- 428false
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Answer : 3. "26 "
Q: A cricketer had a certain average of runs for his 64 innings. In his 65th innings, he is bowled out for no score on his part. This brings down his average by 2 runs. His new average of runs is:
1748 05f2a8dc6a7bb0b71009fdc07
5f2a8dc6a7bb0b71009fdc07- 170false
- 268false
- 3130false
- 4128true
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Answer : 4. "128 "
Q: Find mean of first five prime number.
1737 15ef04bd381a47f2e7ae4419f
5ef04bd381a47f2e7ae4419f- 14.5false
- 23.6false
- 35.4false
- 45.6true
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