81). The mean weight of 34 students of a school is 42 kg. If the weight of the teacher be included, the mean rises by 400 g. Find the weight (in kg) of the teacher.
| A). 66 |
| B). 56 |
| C). 55 |
| D). 57 |
|
82). The average age of 5 members of a family is 25 yr. If the servant of the family is included, the average age increases by 40%. What is the age of servant?
| A). 85 yr |
| B). 90 yr |
| C). 73 yr |
| D). 55 yr |
|
83). The average weight of 10 women is increased by 1 kg if 2 women of 42kg and 38 kg are replaced by 2 men. Find the average weight of both the men.
| A). 46 kg |
| B). 45 kg |
| C). 42 kg |
| D). 44 kg |
|
84). The average age of 30 women decreases by 3 months if a new person Priyanka is included in place of a 25 yr old woman. Calculate the age of Priyanka
| A). 17.5 yr |
| B). 20 yr |
| C). 30 yr |
| D). 22 yr |
|
85). The average temperature of Delhi for four days in a particular month is 48°C. If the average temperature of second and third days is 34°C and the ratio of the temperatures of first and fourth days is 9 : 11, then find out the temperatures of first and fourth days.
| A). \( \Large 45.5 ^{\circ} \), \( \Large 49.9 ^{\circ} \) |
| B). \( \Large 32.4 ^{\circ} \), \( \Large 39.8 ^{\circ} \) |
| C). \( \Large 43.4 ^{\circ} \), \( \Large 68.2 ^{\circ} \) |
| D). None of the above.. |
|
86). Roshan bought 5 pants at Rs.25 each, 10 shirts at Rs.50 each and 15 ties at Rs.35 each. Find the average price of all the articles.
| A). Rs.38.33 |
| B). Rs.45 |
| C). Rs.60 |
| D). Rs.45.33 |
|
87). The average of the test scores of a class of 'm' students is 70 and that of 'n' students is 91. When the scores of both the classes are combined, the average is 80. What is n/m?
| A). \( \Large \frac{11}{10} \) |
| B). \( \Large \frac{13}{10} \) |
| C). \( \Large \frac{10}{13} \) |
| D). \( \Large \frac{10}{11} \) |
|
88). The average salary per head of all workers of an institution is Rs.60. The average salary per head of 12 officers is Rs.400. The average salary per head of the rest is Rs.56. Then, the total number of workers in the institution is
| A). 1030 |
| B). 1032 |
| C). 1062 |
| D). 1060 |
|
89). A man divides his total route of journey into three equal parts and decides to travel the three parts with speed of 15 km/h, 10 km/h and 5 km/h, respectively. Find his average speed of during journey.
| A). 2.28 km/h |
| B). 9 km/h |
| C). 14 km/h |
| D). 8.18 km/h |
|
90). Mr. Bundda travels in his car and covers 1/4 part of his journey with 8 km/h, 3/5 part with 6 km/h and remaining 3/20 part with a speed of 10 km/h. Find out his average speed during the whole journey.
| A). 6.83 km/h |
| B). 9 km/h |
| C). 4 km/h |
| D). 8.5 km/h |
|
