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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? 1545 0

Answer : 1. "12 years"
Explanation :
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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 ? 1545 0

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:
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?
1524 0

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?
1514 0

Answer : 4. "25 year"

Q:
What is the average of the following numbers?
38, 92, 45, 25, 60
1512 0

Answer : 5. "None of these"

Q:
Find the average of all prime numbers between 30 and 50.
1479 0

Answer : 4. "39.8"

Q:
Ram has 5 daughters. The average age of these 5 sisters is 28 years. The youngest one is 16 years old. What was the average age of the 4 daughters before the youngest one was born?
1470 0

Answer : 2. "15 years"

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:
1469 0

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? 1545 05d19d6201388cd24f0860eff

Answer : 1. "12 years" Explanation :undefined

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 ? 1545 05b5cc6c9e4d2b4197774df83

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.

Answer : 4. ""

Answer : 4. "25 year"

Q: What is the average of the following numbers?38, 92, 45, 25, 60 1512 05da059f500e22578c9e9a658

Answer : 5. "None of these"

Q: Find the average of all prime numbers between 30 and 50. 1479 05f3f98a89b782961da39381e

Answer : 4. "39.8"

Q: Ram has 5 daughters. The average age of these 5 sisters is 28 years. The youngest one is 16 years old. What was the average age of the 4 daughters before the youngest one was born? 1470 05df9b6a87c41ef1d193367c5

Answer : 2. "15 years"

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: 1469 05dcba01d45ad6b59c82d7884

Answer : 2. "Rs . 5,080 "

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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? 1545 0

Answer : 1. "12 years"
Explanation :
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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 ? 1545 0

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
1512 0

Q:
Find the average of all prime numbers between 30 and 50.
1479 0

Q:
Ram has 5 daughters. The average age of these 5 sisters is 28 years. The youngest one is 16 years old. What was the average age of the 4 daughters before the youngest one was born?
1470 0

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:
1469 0