C. 17 r 1 is the correct answer
The person on top might be a scam seen the same url too many times. J
The correct answer is A. 2cm
18 2cm
---- = ----
45 5cm
hope this helps
Marbles in a bag: 3 green, 4 yellow, 5 blue, 8 pink.
Event A - get a green or yellow marble
Event B - get a pink marble
Events A and B are independent because we draw a marble from a bag with 20 marbles in both cases.

Probability of combined events is