Average Practice Question and Answer
8 Q: There are 45 male and 15 female employees in an office. If the mean salary of the 60 employees is Rs 4800 and the mean salary of the male employees is Rs 5000, then the mean salary of the female employees is
2053 05de49793848f4a29cf45b0de
5de49793848f4a29cf45b0de- 1Rs 4200true
- 2Rs 4500false
- 3Rs 5600false
- 4Rs 6000false
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Answer : 1. "Rs 4200"
Q: The average of 8 readings is 24.3, out of which the average of first two is 18.5 and that of next three is 21.2. If the sixth reading is 3 less than seventh and 8 less than eight, what is the sixth reading?
2042 05ee0c6df8c4c964f73d9910d
5ee0c6df8c4c964f73d9910d- 124.8false
- 226.5false
- 327.6true
- 429.4false
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Answer : 3. "27.6"
Q: The average of eight successive numbers is 6.5. The average of the smallest and the greatest numbers among them will be:
1912 05f2946eccef453383f1af559
5f2946eccef453383f1af559- 14false
- 26.5true
- 37.5false
- 49false
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Answer : 2. "6.5"
Q: The average of nine consecutive odd numbers is 53. The least odd number is:
1750 05dcba07185d84c59cfbbffd5
5dcba07185d84c59cfbbffd5- 122false
- 227false
- 335false
- 445true
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Answer : 4. "45 "
Q: The average age of 30 boys in a class is 15 years. One boy, aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer is:
1645 05e326ddbd0aa6f23a8fc5141
5e326ddbd0aa6f23a8fc5141- 120 yearsfalse
- 215 yearstrue
- 310 yearsfalse
- 48 yearsfalse
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Answer : 2. "15 years "
Q: In a school with 600 students the average age of the boys is 12 years and that of the girl is 11 years. If he average age of the students is 11 years 9 months, then the number of girls in the school is
1535 06022727ead295556282ad20f
6022727ead295556282ad20f- 1150true
- 2250false
- 3350false
- 4450false
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Answer : 1. "150"
Q: Average height of 40 girls is 148 cm. Average of remaining number is 150 cm. What will be the average of total class if there are 50 girls in the class? 1532 05d19cd2c1388cd24f0860eea
5d19cd2c1388cd24f0860eea- 1148.8 cmfalse
- 2149.2 cmfalse
- 3148.4 cmtrue
- 4144 cmfalse
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Answer : 3. "148.4 cm"
Explanation :
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Q: Subjects, there were 9 boys and some girls. In a test, the mean score obtained by the boys was 13 while that obtained by the girls was 15. If the overall average was 14.28, what was the total number of students in the class?
1462 05dc118bcb0e9c27a7e27c0d7
5dc118bcb0e9c27a7e27c0d7- 124false
- 226false
- 327false
- 425true
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