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The average marks scored by 45 boys and 55 girls are 78 and 84 respectively. Find the average marks scored by all the students together. (Answer should ...
The average weight of 7 men decreases by 3 kg when one of them weighing 150 kg is replaced by another person. Find the weight of the new person
The average of 19 numbers is 15.The average of first 9 numbers are12 and that of the last 9 numbers are15. What will be the 19th number?
Average of 8 numbers is 80. If average of first four and last two numbers is 70 and 60, respectively then find the fifth number given that ratio of fift...
The average of 9 numbers is 100. The average of the first 4 numbers is 65 and the average of the last 4 numbers is 40. What is the 5th number?
The average age of 18 children and their teacher's age are 15 years. If the teacher's age is excluded, the average reduces by 2. What is the teacher's age?
The average of 18 numbers is 40, and the average of the first 9 numbers is 45. Find the average of the remaining 9 numbers.
The sum of weights of 25 body builders is 2020 kg. When the weight of the referee is added, the average weight of body builders and the referee becomes ...
Average of 12 observations calculated by a student was 60 but when he again went through his observations he realised that he took value of three observ...
The average salary of Anil for the January to October is Rs.68000. He got Rs. 60000 in January and Rs.75000 in Nov. The average salary for the months o...