It should be 11. hope this helps :)
I was to tired to write it down
The numerator and denominator must be polynomials so
the answer to your question is - 7x / x^2 ( the last one on the right)
Answer:
The probability of a successful event is the ratio of the number of successful events to the total number of events. In this case, a successful event is selecting a red marble from the box. The total number of events is the total number of marbles in the box:
Red marbles/Total number of marbles
4/12 divide
=1/3