Average Practice Question and Answer
8Q: 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? 1344 05d19d6201388cd24f0860eff
5d19d6201388cd24f0860eff- 112 yearstrue
- 214.5 yearsfalse
- 315 yearsfalse
- 417 yearsfalse
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Answer : 1. "12 years"
Explanation :
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Q: What will be the average of the following set of scores?
59, 84, 44, 98, 30, 40, 58
1338 05df0b93a0183ea49d62ac296
5df0b93a0183ea49d62ac29659, 84, 44, 98, 30, 40, 58
- 162false
- 266false
- 375false
- 452false
- 559true
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Answer : 5. "59"
Q: 16 children are to be divided into two group A and B consisting of 10 and 6 children. The average percent marks obtained by the children of Group A is 75 and the average percent marks of all the 16 children is 76. What is the average percent marks of children of Group B?
1329 05f5afb19dc518b408a418a15
5f5afb19dc518b408a418a15- 1$$ {78}{2\over3}$$false
- 2$$ {77}{1\over3}$$false
- 3$$ {78}{1\over3}$$false
- 4$$ {77}{2\over3}$$true
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Answer : 4. "$$ {77}{2\over3}$$"
Q: Average age of 12 men is 56 years. Two members of 60 years and 52 years die. What will the average age of the remaining members? 1327 05d19cf5a1388cd24f0860eef
5d19cf5a1388cd24f0860eef- 154 yearsfalse
- 255 yearsfalse
- 356 yearstrue
- 458 yearsfalse
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Answer : 3. "56 years "
Explanation :
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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?
1317 064225cba2b960e1a4180e2bf
64225cba2b960e1a4180e2bf- 136.00false
- 234.00true
- 337.20false
- 438.20false
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Answer : 2. "34.00"
Q: In a certain year, the average monthly income of a person was Rs.3,400. For the first eight months of the years, his average monthly income was Rs. 3,160 and for the last five months, it was Rs.4,120. His income in the eighth month of the year was:
1315 05dcba01d45ad6b59c82d7884
5dcba01d45ad6b59c82d7884- 1Rs . 3,160false
- 2Rs . 5,080true
- 3Rs . 15,520false
- 4Rs . 5, 520false
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Answer : 2. "Rs . 5,080 "
Q: What is the average of the following numbers?
38, 92, 45, 25, 60
1311 05da059f500e22578c9e9a658
5da059f500e22578c9e9a65838, 92, 45, 25, 60
- 148false
- 254false
- 356false
- 450false
- 5None of thesetrue
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Answer : 5. "None of these"
Q: The twice of sum of the ages of a father and his son is 8 times the age of the son. If the average age of the father and the son is 30 years, what is father's age ? 1310 05b5cc6c9e4d2b4197774df83
5b5cc6c9e4d2b4197774df83- 142 yrsfalse
- 245 yrstrue
- 336 yrsfalse
- 438 yrsfalse
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Answer : 2. "45 yrs"
Explanation :
Answer: B) 45 yrs Explanation: Let father's age be x year and son's age be y year. According to question, 2(x+y) = 8y _______(I) and (x+y)/2 = 30 => x+y = 60 years__________(II) From equation (I) and (II) 8 y = 120 y = 15 years, Hence x = 45 years.