we are given

we can use vertex form parabola formula

so, we can complete x square




so, option-A........................Answer
There are 5 x 10 = 50 different outcomes.
Of them only 3x10, 4x10, 4x9, 4x8, 5x10, 5x9, 5x8, 5x7 and 5x6 are greater or equal than 30. Those are 9 possibilities.
Then 50 - 9 = 41 are the possibilities that the product of the two numbers is less than 30.
The probalility, then, is 41/50 = 0.82
Since 30 is not a square root you would use the closest square roots √25 and √36 which makes your answer 5 and 6