The average of the first nine prime numbers is (a) 9 (b) 11 (c) `11 1/9` (d) `11 2/9`

The mean of the first ten even natural numbers is (a) 9 (b) 10 (c) 11 (d) 12

The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is: (a) 11 (b) 11.3 (c) 11.4 (d) 11.5

Show the following numbers on the number line.(a) 0.2 (b) 1.9 (c) 1.1 (d) 2.5

Show the following numbers on the number line. (a) 0.2 (b) 1.9 (c) 1.1 (d) 2.5

Show the following numbers on the number line. (a) 0.2 (b) 1.9 (c ) 1.1 (d) 2.5

The average of 21 numbers is 12. The average of the first 11 numbers is 9 and the average of the last 11 numbers is 15. What is the value of the middle number ?

The average of 11 numbers is 10.9. If the average of the first six numbers is 10.5 and that of the last six numbers is 11.4, then the middle number is :

The average of eleven numbers is 68. The average of the first four numbers is 78 and that of the next four is 63. The 9^(th) number is two times the 11^(th) number and the 10^(th) number is half of the 11^(th) number. What is the average of the 9^(th) and 11^(th) numbers ?

The average of 31 numbers is 59. The average of the first 11 numbers is 53.9 and that of the last 21 numbers is 62.1. lf the 11th number is excluded, then what is the average of the remaining numbers?

The sum of two number is s40 and their difference is 4. The ratio of the numbers is 11:9 b.11:18 c.21:19 d.22:9