Abag has 5 red marbles, 6 blue marbles and 4 black marbles. what is the probability of picking a blue marble, replacing it, and then picking a red marble?
a) 8/75
b) 3/5
c) 2/15
d) 4/45

Probability of picking a blue marble : 6 / 15 = 2/5
Probability of picking a red marble: 5 / 15 = 1/3
2/5 * 1/3 = 2/15
C ) 2/15

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct

The answer is 76° i believe