a) 23 years b) 24 years c) 25 years d) None of these Answer: a Explanation: ...
View QuestionThe average weight of 8 person’s increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What might be the weight of the new person?
a) 76 kg b) 76.5 kg c) 85 kg d) Data inadequate Answer: c Explanation: ...
View QuestionThe average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?
a) 0 b) 1 c) 10 d) 19 Answer: d Explanation: Average of 20 numbers = 0 Sum of 20 numbers ...
View QuestionThe average height of 35 girls in a class was calculated as 160 cm. It was later found that the height of one of the girls in the class was wrongly written as 144 cm, whereas her actual height was 104 cm. What is the actual average height of the girls in the class? ( rounded off to 2 digits after decimal)
a) 158.54 cm b) 158.74 cm c) 159.56 cm d) None of these Answer: d Explanation: ...
View QuestionThe average of 10 numbers is 40.2. Later it is found that two numbers have been wrongly added. The first is 18 greater than the actual number and the second number added is 13 instead of 33. Find the correct average.
a) 40.2 b) 40.4 c) 40.6 d) 40.8 Answer: b Explanation: Correct sum = (40.2 × 10 - ...
View QuestionThe average marks obtained by 22 candidates in an examination are 45. The average marks of the first ten are 55 and that of the last eleven are 40. The number of marks obtained by the 11th candidates is
The average marks obtained by 22 candidates in an examination are 45. The average marks of the first ...
View QuestionThe average monthly income of a family of four earning members was Rs. 15130. One of the daughters in the family got married and left home, so the average monthly income of the family came down to Rs. 14660. What is the monthly income of the married daughter?
a) Rs. 12000 b) Rs. 15350 c) Rs. 16540 d) Cannot be determined Answer: c Explanation: ...
View QuestionThe average height of 25 boys is 1.4 m. When 5 boys leave the group, then the average height increased by 0.15 m. What is the average height of the 5 boys who leave ?
a) 0.8 m b) 0.9 m c) 0.95 m d) 1.05 m Answer: a Explanation: ...
View QuestionIn a class with a certain number of students, if one student weighting 50 kg is added then the average weight of the class increased by 1 kg. If one more student weighting 50 kg is added, then the average weight of the class increased by 1.5 kg over the original average. What is the original average weight (in kg) of the class?
a) 2 b) 4 c) 46 d) 47 Answer: d Explanation: Let the original average weight ...
View QuestionThe average age of a husband and his wife was 23 years at the times of their marriage. After five years they have a one-year old child. The average age of the family now is
a) 19 years b) 23 years c) 28.5 years d) 29.3 years Answer: a Explanation: Sum of ...
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