The average of 12 numbers is 9. If each number is multiplied by 2 and added to 3, the average of the new set of numbers is
21
Average of 12 numbers = 9 If each number is multiplied by 2 and added to 3, then the average will also change accordingly => New average = 9 × 2 + 3 = 21
Important Questions from Average
The average mark of 13 papers is 80. The average marks of the first 7 papers are 84 and that of the last 7 papers is 70. Find the marks obtained in the 7th paper.
The average age of the Indian cricket team playing in the Capetown test match is 28 years. If the average age of 10 players except the Captain is 27.8 years, then the age of the Captain is:
The average of 50 number is 36. If two numbers, namely 63 and 65 are discarded, the average of the remaining numbers is (Correct to two decimal places)
The numbers of visitors every hour in a shop from 1 p.m. to 8 p.m. on Monday were recorded as 7, 10, 15, 22, 6, 4 and 13. The arithmetic mean of visitors is:
The average temperature on Friday, Saturday and Sunday was 26∘ and on Saturday, Sunday and Monday it was 24∘. If on Monday it was exactly 25∘. Then what was the temperature on Friday?
