Average of 10 numbers is calculated as 21. Later it was found that one number was wrongly written as 26 instead of 16. Find the correct average.
Ayush finds average of 20, 2 digits numbers. If the digits of one of the numbers is interchanged, average increases by 2.7. Find the difference between the digits of that 2 digits number.
After replacing an old student by a new student, who is three years old, it is found that the average age of a group of 10 students is the same as it was 6 months ago. Find the difference between the ages of replaced and new students.
Out of 12 boys, the height of one-third of boys is 1 m 10cm, the height of remaining is 1 m 20 cm. Find the average height of all the boys.
Average of radii of two circles is 28 cm. What will be the sum of their perimeters?
In a T-20 match, required run rate to win is 8.4. If at the end of 16 over run rate is 6.5, find the run rate to win the match.
On Sunday the average number of visitors to a library is 330, and on other days the average number of visitors is 120. Find the average number of visitors in a month of 30 days beginning with Saturday.
The average of n numbers is x. the first number is increased by 1, the second number is increased by 2, the third number is increased by 3 and so on. Find the average of new numbers.
The weight of 4 members out of 12 are measured in a sequence. Average weight is calculated after measuring weight of each member. Each time average is calculated and it is 1 kg more than previous average. Find the difference of weight of first and last member.
What will be average of 260 + 430 + 1610 + 410 ?
Aman was asked to find the average of n consecutive numbers starting from 1, but he added a number twice, then the wrong average calculated was Find the number that was added twice.
