Aptitude | Arithmetic Aptitude 6 | Question 6

The average of 21 results is 20. Average of 1^{st} 10 of them is 24 that of last 10 is 14. the result of 11’th is :

**(A)** 42

**(B)** 44

**(C)** 46

**(D)** 40

**Answer:** **(D)** **Explanation:**

11'th result = sum of 21 results – sum of 20 results = 21 x 20 – (24 x 10 + 14 x 10) = 420 – (240 + 140) = 420- 380 = 40