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Start learning 50% faster. Sign in nowA group of 15 students appeared for three tests. The overall average score across all tests is 70. The average score in the first test was 75, and in th...
There are 15 numbers such that average of first 12 numbers is 65 while the average of last five numbers is 70. Find the 12th number, if the ratio betwee...
Average of 10 observations calculated by a student was 60 but when he again went through his observations he realised that he took value of three observ...
Each side of a rhombus is 20cm long and the length of one of its diagonals is 24cm, then find the area of the rhombus.
The average age of 35 employees in an office is 28 years. If the age of the manager is included, the average age increases by 2 years. Find the age of t...
The average mark obtained by 110 candidates in a certain examination is 45. If the average marks of passed candidates are 50 and that of the failed cand...
In an examination the average marks of Rohit is 60. If he got 15 more marks in science and 21 more marks in maths then his average would have been 66. F...
The average of five even numbers is 38. If we replace two of these even numbers, 88 and 92, with a single even number X, the new average decreases by 4....
The average rainfall in a city for the first 7 days of a month is 12 mm per day. To have an average of 20 mm per day over 14 days, what should be the av...
