What is the sum of numbers 2?, 3? and 4? ?

The correct answer is (a).

The sum of numbers 2?, 3? and 4? is 9.

The question is asking for the sum of the numbers 2x, 3x, and 4x, where x is an unknown number. We can solve this equation by adding the like terms together.

2x + 3x + 4x = 9x

9x = 9

x = 1

Therefore, the sum of the numbers 2x, 3x, and 4x is 9.

Option (b) is incorrect because 3 is not the sum of the numbers 2x, 3x, and 4x.

Option (c) is incorrect because 0 is not the sum of the numbers 2x, 3x, and 4x.

Option (d) is incorrect because 2 is not the sum of the numbers 2x, 3x, and 4x.