There are ‘x’ students in a class. Out of them ‘y’ are girls. The number of boys is 5 more than the number of girls. The sum of weight and the a...
The average of 8 numbers is 21. When a new number is added, the average becomes 23. Find the new number.
Determine the value of a − b given that a + 3b = 18a and 3a + b = 30 .
The average age of A and B is 17 years. If A is to be replaced by C, the average would be 16 years. The average age of C and A is 18 years. Find the age...
In a school, the average number of books that some numbers of boys have is 120 and average number of books that some numbers of girls have is 85. If eac...
- The average of series 'S2', which consists of 6 consecutive even numbers, is 29. The second term of series 'T2', which consists of 5 consecutive odd number...
The average of marks obtained by 50 candidates was 56. If the average of the passed candidates was 60 and that of the failed candidates was 50, then th...
- The average marks obtained by 20 students in a test is 74. It was later found that 78 was wrongly recorded as 87 and 69 was wrongly written as 63. What is ...
The average salary of 400 employees were found to be Rs. 250. Later on, it was discovered that the wages of two workers were misread as 260 and 140 inst...
In a class of 50 students there are 22 girls who scored an average of 35 marks in the test. What is the average marks of the boys if the class average ...
