Practice MCQ Questions and Answer on Average
41.
Average weight of 25 persons is increased by 1 kg when one person weighing 60 kg is replaced by a new person. Weight of new the person is-
- (A) 50 kg
- (B) 61 kg
- (C) 86 kg
- (D) 85 kg
42.
The 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
43.
A man started his journey from Lucknow to Kolkata, which is 200 km, at the speed of 40 kmph then he went to Banglore which is 300 km, at the speed of 20 kmph. Further he went to Ahmedabad which is 500 km, at the speed of 10 kmph. The average speed of the man is :
- (A) 14$${\frac{2}{7}}$$ kmph
- (B) 14$${\frac{5}{7}}$$ Kmph
- (C) 15.6 kmph
- (D) 16.1 kmph
44.
16 children are to be divided into two groups A and B 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 ?
- (A) $$77\frac{1}{3}$$
- (B) $$77\frac{2}{3}$$
- (C) $$78\frac{1}{3}$$
- (D) $$78\frac{2}{3}$$
45.
The numbers of students in section A and section B of a class are 50 and 62, respectively. The average score in mathematics of all students is 75. If the average score of students in section A is 20% more than that of students in section B, then what is the average score of students in section A (correct to one decimal place)?
- (A) 85.7
- (B) 87.5
- (C) 82.6
- (D) 84.3
46.
The average age of three boys is 15 years. If their ages are in ratio 3 : 5 : 7, the age of the youngest boy is
- (A) 21 years
- (B) 18 years
- (C) 15 years
- (D) 9 years
47.
The arithmetic mean of the scores of a group of students in a test was 52. The brightest 20% of them secured a mean score of 80 and the dullest 25% a mean score of 31. The mean score of remaining 55% is-
- (A) 45
- (B) 50
- (C) 51.4 approx
- (D) 54.6 approx
48.
What is the average of the first six (positive) odd number each of which is divisible by 7?
- (A) 42
- (B) 43
- (C) 47
- (D) 49
49.
The ratio of the number of players in the three cricket teams A, B and C is 2 : 5 : 3. If the ratio of number of runs scored per player for each of the three teams A, B and C, is 30 : 17 : 25 respectively, then what is the average number of runs scored per player across all the three teams collectively?
- (A) 20
- (B) 21
- (C) 22
- (D) 23
50.
A fruit seller sold big, medium and small sizes apples of Rs. 15, Rs. 10 and Rs. 5, respectively. The total number of apples sold were in the ratio 3 : 2 : 5. Find the average cost of an apple.
- (A) 8
- (B) 10
- (C) 9
- (D) 7