You have to add both of the equations for a 180° percent
Total number of balls = 12 + 7 = 19
p(first ball is a red) = 7/19
Answer: 7/19
The answer is Evan is correct I'm not sure tho
Step-by-step explanation:
Let's say b is the rate of the boat in still water, and c is the rate of the current.
Distance = rate × time
Going upstream:
100 = (b − c) (5)
20 = b − c
Going downstream:
100 = (b + c) (2)
50 = b + c
Solve the system of equations using substitution or elimination. Using elimination, add the equations together:
70 = 2b
b = 35
c = 15
The boat's speed is 35 km/h, and the current's speed is 15 km/h.
