Answer:

Step-by-step explanation:
Urn U1: 3 red and 2 yellow marbles, in total 5 marbles.
The probability to select red marble is
Urn U2: 3 red and 7 yellow marbles, in total 10 marbles.
The probability to select red marble is
Urn U1: 1 red and 4 yellow marbles, in total 5 marbles.
The probability to select red marble is
The probability to choose each urn is the same and is equal to 
Thus, the probability that the marble is red is

Answer:
p * s(3) + b
Step-by-step explanation:
Jonny earns $9.75 an hours. Divide 195 by 20 to get the answer.
If you use a ruler and if it's more than 120° its not a right triangle it has to be 120°