The jar contains 3+7+5=15 marbles in total.
We have to find the probability of the following events:
1. We choose a red marble from the jar that contains 15 marbles in total, 3 of them are red
2. We choose a blue marble from the jar that contains 15 marbles in total, 5 of them are blue
3. We choose a white marble from the jar that contains 15 marbles in total, 7 of them are white
The probability of the first event to happen is:

The probability of the second event to happen is:

The probability of the third event to happen is:

The probability of all three events to happen is:

I believe this means y=13
Plug in the values and see which ones do not fi:-
. A 3(-4) + 2(1) = -10
that fits so it must be B, C or D.
Answer:
• changing an interior angle to a reflex angle
Step-by-step explanation:
In order for the outline of the polygon to have a pair of sides that is concave (pointed inward, rather than outward), the corresponding interior angle must be a reflex angle. (It must measure more than 180°.) Draw one; you'll see.