Practicing Success
Practicing Success
CUET Preparation Today
The average of 10 observations is 21. A new observation is included and the average of these 11 numbers is 1 less than the previous average. The 11th observation is ______. |
21 11 10 12 |
10 |
Sum of 10 numbers = 10 × 21 = 210 After adding 1 new number , Sum of 11 numbers = 11 × 20 = 220 New Added number = 220 - 210 = 10 |
