Quantitative Aptitude-Area
Quantitative Aptitude-Area
71. Distanc e between two stations A and B is 778 km. A train covers the journey from A to B at 84 km per hour and returns back to A with a uniform speed of 56km per hour. Find the average speed of the train during the whole journey?
- 67.0 km /hr
- 67.2 km /hr
- 69.0 km /hr
- 69.2 km /hr
72. The avearge age of 36 students in a group is 14 years. when teacher's age is included to it, the average increases by one.What is the teacher's age in years?
- 31
- 36
- 51
- None of these
73. The average of five numbers id 27. If one number is excluded,the average becomes 25. The excluded number is
- 25
- 27
- 30
- 35
74. The batting average for 40 innings of a cricket palyer is 50 runs. His highest score exceeds his lowest score by 172 runs. If these two innings are excluded, the average of the remaining 38 innings is 48 runs. The highest score of the player is
- 165 runs
- 170 runs
- 172 runs
- 174 runs
75. The avearge score of a cricketer for ten matches is 38.9 runs. If the average for the first six matches is 42. Then find the average for the last four matches?
- 33.25
- 33.5
- 34.25
- 35
76. A library has an average of 510 visitors on sundays and 240 on other days. The average number of visitors per day in a month of 30 days beginning with a sunday is
- 250
- 276
- 280
- 285
77. The average of six numbers is X and the average of three of these is Y.If the average of the remaining three is z, then
- x = y + z
- 2x = y + z
- x = 2y + 2z
- None of these
78. A motorist travel to a place 150 km away at an avearge speed of 50 km/hr and returns ar 30 km/hr.His average speed for the whole jouney in km/hr is
- 35
- 37
- 37.5
- 40
79. The average age of a husband and his wife was 23 years at the time of their marriage.After five years they have a one year old child.The average age of the family now is
- 19 years
- 23 years
- 28.5 years
- 29.3 years
80. In an examination, a pupil's average marks were 63 per paper. If he had obtained 20 more marks for his Geography paper and 2 more marks for his history paper, his average per paper would have been 65. How many papers were there in the examination?
- 8
- 9
- 10
- 11