Question
The average of 6 numbers is 40. Later, two more numbers
are added whose average is 'x' . After this, the overall average becomes 20% more than before. What is the value of 'x'?Solution
ATQ,
Sum of 6 numbers = 6 × 40 = 240 New average after adding 2 numbers = 40 × 1.2 = 48 Total sum of 8 numbers = 8 × 48 = 384 Sum of new 2 numbers = 384 - 240 = 144 Average of 2 new numbers = 144 ÷ 2 = 72 So, value of x = 72
A set contains ten numbers. The average of the first six numbers is (x - 4), and the average of the last three numbers is (x + 2). The average of the en...
The average of 5 numbers is 54. The average of the first four is 52. Find the fifth number.
Average of four consecutive prime numbers T1, T2, T3, and T4 is (17 + x). If the average of T1 and T2 is (13 + x) and the average of T3 and T4 is (13 + ...
Average of 8 numbers is 70. If average of first four and last two numbers is 80 and 45, respectively then find the fifth number given that ratio of fift...
The average of 10 numbers is 50. If the largest number is removed, the average drops by 2. Find the largest number.
- The average of three numbers is 60. When three more numbers are included, the average increases by 6. Find the average of the numbers included.
The average number of mangoes distributed among five farmers is 12. If each farmer received 1 mango more than the farmer before him, then find the highe...
The batting average of 40 innings of a cricket player is 50 runs. His highest score exceeds his lowest by 172 runs. If the two are excluded, the average...
In an examination, a student has an average score of 84. If he had scored 14 more marks in Science and 19 more marks in English, his average would incre...
If the average marks of the three batches 32, 45 and 54 student respectively is 50, 42 and 35, then find the approximate average mark of all the students?
