Answer:
Step-by-step explanation:
Given
Probability of clearing exam in 1 st attempt=0.5
Probability of clearing exam in 2 nd attempt=0.7
Probability of clearing exam in 3 rd attempt=0.8
Probability that she passes the exam

(b)P(Pass qualification on 2nd try|passes qualification)
P(Pass qualification on 2nd try|passes qualification)
P(Pass qualification on 2nd try|passes qualification)
X=1
Y=6
X=3
Y=18
X=5
Y=30
X=7
Y=42
X=9
Y=54
Answer: 3^2 * 3^8
Step-by-step explanation: 3^(4-2) * 3^(5+3)
It is - 16 because adding two negatives give you a negative
138 x ? = 75
? = 75/138 = 0.544(3sf)
so about 54.35% (2dp) decrease