The numbers 10, 12, 14, 16, 17 and x are in ascending order. If the mean and median of these observations are same, the value of x is :

1. 16

2. 14

3. 54

4. 21

The inter quartile range for the given ogive is :

1. 42

2. 32

3. 44

4. 54

The mean age of nine boys is 28 years and if one new boy joins them the mean age increases by one.

Assertion(A): The age of new boy is (29 x 10 - 28 x 9) years.

Reason(R): The age of new boy is (29 - 28) x 10 years.

1. A is true, R is false.

2. A is false, R is true.

3. Both A and R are true and R is correct reason for A.

4. Both A and R are true and R is incorrect reason for A.