## 131. Of the three numbers, the first is twice the second and the second is twice the third. The average of the reciprocal of the numbers is $$\frac{7}{72}$$ . The numbers are:

## 132. There are 4 consecutive odd numbers (x_{1}, x_{2}, x_{3} and x_{4}) and three consecutive even numbers (y_{1}, y_{2} and y_{3}). The average of the odd numbers is 6 less than the average of the even numbers. If the sum of the three even numbers is 16 less than the sum of the four odd numbers, what is the average of x_{1}, x_{2}, x_{3} and x_{4}?

_{1}, x

_{2}, x

_{3}and x

_{4}) and three consecutive even numbers (y

_{1}, y

_{2}and y

_{3}). The average of the odd numbers is 6 less than the average of the even numbers. If the sum of the three even numbers is 16 less than the sum of the four odd numbers, what is the average of x

_{1}, x

_{2}, x

_{3}and x

_{4}?

## 133. There are three positive numbers. One third of the average of all the three numbers is 8 less than the value of the highest number. The average of the lowest and the second lowest number is 8. What is the highest number?

## 134. Average score of a class of 60 students, in an exam, was 43. Average score of the students who had passed is 52 and the average score of students who had failed is 16. How many failed the exam?

## 135. The average weight of boys in a class is 30 kg and the average weight of girls in the same class is 20 kg. If the average weight of the whole class is 23.25 kg, what could be the possible strength of boys and girls respectively in the same class?

## 136. The mean monthly salary paid to graduating MBA class of a management institute is Rs. 16000. The mean monthly salary paid to students with work experience is Rs. 18000. The corresponding figure for the students without any work experience is Rs. 12000. Determine the percentage of students with work experience and those without any work experience in the class.

## 137. The monthly incomes of five persons are Rs. 1132, Rs. 1140, Rs. 1144, Rs. 1136 and Rs. 1148 respectively. What is their arithmetic mean?

## 138. Kunal bought 65 books for Rs. 1050 from one shop and 50 books for Rs. 1020 from another. What is the average price he paid per book?

## 139. Average age of ten persons learning yoga is 32 years. When the age of their instructor is added, the average age becomes 34 years. The age of their instructor is-

## 140. There were 24 students in a class. One of them, who was 18 years old, left the class and his place was filled up by a newcomer. If the average of the class thereby, was lowered by one month, the age of the newcomer is-

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