JEE Advanced Mathematics question

Three dice are thrown. The probability of getting a sum which is a perfect square is

Answer: (D)

Solution

The sum ranges over to , so the possible perfect squares are . Using the coefficient of in , where the coefficient of in is :

- sum 4: coefficient of is ; - sum 9:

Create a free account to read the complete working (4 steps), and practise questions like this in a timed test.

Question ID VK-109738