Average Questions Practice Question and Answer
8Q: 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 ? 2070 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:Directions: Given table shows the data of population in 5 different parks. Study the data carefully and answer the questions.
If 30 females from each park are above 80 years age then find the average of no. of females who are below or equal to the age of 80 years from all the parks.
2066 0603f62860634b252a6b6647d
603f62860634b252a6b6647d- 1295false
- 2285false
- 3300true
- 4280false
- 5290false
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Answer : 3. "300"
Q: The average of three consecutive odd numbers is 12 more than one third of the first of these numbers. What is the last of the three numbers?
2066 05f2a625dcef453383f1e3ce5
5f2a625dcef453383f1e3ce5- 119true
- 216false
- 315false
- 417false
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Answer : 1. "19 "
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:
2053 05f2a8dc6a7bb0b71009fdc07
5f2a8dc6a7bb0b71009fdc07- 170false
- 268false
- 3130false
- 4128true
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Answer : 4. "128 "
Q: The average of the squares of first ten natural numbers is
2046 05f294670a5ce9779bd25791b
5f294670a5ce9779bd25791b- 137.5false
- 238.5true
- 335.5false
- 436false
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Answer : 2. "38.5"
Q: The average of eleven numbers is 68. The average of the first numbers is 78 and that of the next four number is 63. The 9th number is two time the 11th number and the 10th number is 4 less than the 11th number. What is the average of the 9th and 11th numbers?
2024 06051c6e0d3e3d30b29d9a74e
6051c6e0d3e3d30b29d9a74e- 170.1false
- 270.5true
- 372.6false
- 472.2false
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Answer : 2. "70.5"
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?
2019 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: The average of marks obtained by 120 candidates in an examination is 35. The average of marks obtained by passed candidates is 39 and that of for failed candidates is 15. What is the no. of passed candidates? 2016 05d19d8bd1388cd24f0860f10
5d19d8bd1388cd24f0860f10- 1100true
- 2120false
- 3150false
- 4140false
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Answer : 1. "100"
Explanation :
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