51). Average weight of 19 men is 74 kg and the average weight of 38 women is 63 kg. What is the average weight (rounded off to the nearest integer) of all the men and the women together?
| A). 59 kg |
| B). 65 kg |
| C). 69 kg |
| D). 67 kg |
|
52). The average marks of 30 students are 45 but after checking, there are two mistakes found. After adjustment, if a student got 45 more marks and other student got 15 less marks, then what will be the adjusted average?
| A). 45 |
| B). 44 |
| C). 47 |
| D). 46 |
|
53). The average weight of 21 boys was recorded as 64 kg. If the weight of the teacher was added, the average increased by one kg. What was the teacher's weight?
| A). 86 kg |
| B). 64 kg |
| C). 72 kg |
| D). 98 kg |
|
54). The average age of 14 girls and their teacher's age is 15 yr. If teacher's age is excluded, then the average reduced by 1. What is the teacher's age?
| A). 29 yr |
| B). 35 yr |
| C). 32 yr |
| D). 30 yr |
|
55). The average of six observations is 12. The average decreases by 1 when a new observation is included. What is the seventh observation?
|
56). The average age of a class is 35 yr. 6 new students with an average age of 33 yr joined in that class, thereby decreasing the average by half year. The original strength of the class was
| A). 14 |
| B). 18 |
| C). 16 |
| D). 20 |
|
57). The average age of 4 members of a family is 25 yr. If head of the family is included in this group, then average age increases by 20%. Find out the age of the head.
| A). 45 yr |
| B). 50 yr |
| C). 55 yr |
| D). 60 yr |
|
58). The average age of a committee of 11 persons increases by 2 yr when 3 men of 32 yr, 34 Yr and 33 yr are replaced by 3 women. What will be the average age of those 3 women?
| A). 40 yr |
| B). \( 41\frac{1}{3} \) yr |
| C). 41 yr |
| D). \( 40\frac{1}{3} \) yr |
|
59). Average of ten numbers is 7. If every number is multiplied by 12, what will be the average of new numbers?
| A). 7 |
| B). 9 |
| C). 82 |
| D). 84 |
|
60). The mean temperature of Monday to Wednesday was \( 37 ^{\circ} C \) and of Tuesday to Thursday was \( 34 ^{\circ} C \). If the temperature on Thursday was 4/5 that of Monday, the temperature of Thursday was
| A). \( 35.5 ^{\circ} C \) |
| B). \( 34 ^{\circ} C \) |
| C). \( 36.5 ^{\circ} C \) |
| D). \( 36 ^{\circ} C \) |
|
