If the mean of 10, 12, 16, 20, p and 26 is 17, then the value of p is :

1. 16

2. 18

3. 20

4. 24

Mean of 10 observations is 20 and that of other 15 observations is 16. Mean of all 25 observations will be :

1. 16.6

2. 18.6

3. 19.6

4. 17.6

If the mean of the data x₁, x₂, x₃, ….., x_n is 'a', then the mean of the data x₁ + a, x₂ + a, …., x_n + a is :

1. a

2. 2a

3. $\dfrac{1}{2}$a

4. $\dfrac{a}{3}$

If the mean of the data y₁, y₂, y₃, …., y_n is 102, then the mean of the data 5y₁, 5y₂, 5y₃, …., 5y_n is :

1. 102

2. 204

3. 510

4. 606