2/16 because when you add all the marbles, you get 16 in total and there are 2 red marbles so there is a 2/16 chance of choosing one of the red marbles. If you want it simplified, it would be 1/8.
Step-by-step explanation:
Area of the original rectangle=7×9 m²
=63m²
Let triangle removed be named as ∆ABC right angle at B, AB=(9-6)m = 3m
BC=(7-2)m =5m
area of ∆ABC= 1/2 ×3×5=7.5m²
area of the shaded region = (63-7.5)m²
= 55.5m²
<span>x^3=8/125
x^3 = 2^3 / 5^3
x = 2/5
hope it helps</span>