Average Questions Practice Question and Answer
8 Q: The average age of 24 boys and their teacher is 15 years. When the teacher's age is excluded, the average age decreases by 1 year. The age of the teacher is:
1555 05f2a6089a5ce9779bd291953
5f2a6089a5ce9779bd291953- 140 Yearsfalse
- 241 Yearsfalse
- 338 Yearsfalse
- 439 Yearstrue
- Show Answer
- Workspace
- SingleChoice
Answer : 4. "39 Years"
Q: 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? 1548 05d19e0457619fe30b9d34a66
5d19e0457619fe30b9d34a66- 175.7false
- 275.8false
- 375.9true
- 475.6false
- Show Answer
- Workspace
- SingleChoice
Answer : 3. "75.9"
Explanation :
undefined
Q: 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? 1539 05d19d6201388cd24f0860eff
5d19d6201388cd24f0860eff- 112 yearstrue
- 214.5 yearsfalse
- 315 yearsfalse
- 417 yearsfalse
- Show Answer
- Workspace
- SingleChoice
Answer : 1. "12 years"
Explanation :
undefined
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? 1533 05d19cf5a1388cd24f0860eef
5d19cf5a1388cd24f0860eef- 154 yearsfalse
- 255 yearsfalse
- 356 yearstrue
- 458 yearsfalse
- Show Answer
- Workspace
- SingleChoice
Answer : 3. "56 years "
Explanation :
undefined
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?
1515 05f5afb19dc518b408a418a15
5f5afb19dc518b408a418a15- 1false
- 2false
- 3false
- 4true
- Show Answer
- Workspace
- SingleChoice
Answer : 4. "
Q: When the average age of husband, wife and their son was 42 years, the son got married and a child was born just one year after marriage. When the child turned to be 5 years, the average age of the family becomes 36 years. What was the age of daughter-in-law at the time of marriage?
1509 05f2cfeaebe9f31290fb86c32
5f2cfeaebe9f31290fb86c32- 124 yearfalse
- 228 yearfalse
- 330 yearfalse
- 425 yeartrue
- Show Answer
- Workspace
- SingleChoice
Answer : 4. "25 year"
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 ? 1505 05b5cc6c9e4d2b4197774df83
5b5cc6c9e4d2b4197774df83- 142 yrsfalse
- 245 yrstrue
- 336 yrsfalse
- 438 yrsfalse
- Show Answer
- Workspace
- SingleChoice
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: What is the average of the following numbers?
38, 92, 45, 25, 60
1505 05da059f500e22578c9e9a658
5da059f500e22578c9e9a65838, 92, 45, 25, 60
- 148false
- 254false
- 356false
- 450false
- 5None of thesetrue
- Show Answer
- Workspace
- SingleChoice