Question

Let the relation R be defined on N by aRb if 2a + 3b = 30. Then which of the following belong(s) to R?

• A. (3,8)
• B. (2,9)
• C. (9,4)
• D. (5,7)

Answer 1

Answer: (A), (C)

The correct options are
A (3,8)
C (9,4)

Relation R is defined on N by aRb if 2a + 3b = 30.
The pair (a,b) which satisfies equation 2a+3b=30 will belong to R.
(3,8) and (9,4) satisfy the above equation and hence belong to R.