Average Practice Question and Answer
8Q: The average value found for 20 observations was 75. It was noticed later that 97 was read as 79. So, what was the correct average value? 2056 05d19e0457619fe30b9d34a66
5d19e0457619fe30b9d34a66- 175.7false
- 275.8false
- 375.9true
- 475.6false
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Answer : 3. "75.9"
Explanation :
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Q: The average weight of 29 students is 40 kg. If the weight of teacher be included the average weight increased by 400 gms. The weight of the teacher is-
2038 0603dce2ee759ac364c8ba6f3
603dce2ee759ac364c8ba6f3- 150 kgfalse
- 249 kgfalse
- 352 kgtrue
- 455 kgfalse
- 5None of thesefalse
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Answer : 3. "52 kg "
Q: The average weight of Sudesh, Jyothi and Ritu is 89 kg. If the average weight of Sudesh and Jyothi be 98 kg and that of Jyothi and Ritu be 83 kg, then the weight of Jyothi is
2033 05f3f922654900c5349e3813e
5f3f922654900c5349e3813e- 158false
- 256false
- 366false
- 495true
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Answer : 4. "95"
Q: What is the average of the following numbers?
38, 92, 45, 25, 60
2031 05da059f500e22578c9e9a658
5da059f500e22578c9e9a65838, 92, 45, 25, 60
- 148false
- 254false
- 356false
- 450false
- 5None of thesetrue
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Answer : 5. "None of these"
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:
2019 05f2a8dc6a7bb0b71009fdc07
5f2a8dc6a7bb0b71009fdc07- 170false
- 268false
- 3130false
- 4128true
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Answer : 4. "128 "
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 ? 2019 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.
Q: The average age of students in a class is 15.8 years. The average age of boys in the class is 16.4 years and that of the girls is 15.4 years. The ratio of the number of boys to the number of girls in the class is:
2018 05ed73fd04bd6e60aba370eb4
5ed73fd04bd6e60aba370eb4- 11: 4false
- 24 : 2false
- 32 : 3true
- 43 : 4false
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Answer : 3. "2 : 3"
Q: The average salary, per head, of all the workers of an institution, is Rs. 60. The average salary of 12 officers is Rs. 400; the average salary, per head, of the rest is Rs. 56. The total number of workers in the in situation is
2015 05f2a89b8cef453383f1ed26c
5f2a89b8cef453383f1ed26c- 11032true
- 21020false
- 31030false
- 41035false
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Answer : 1. "1032 "
Explanation :
