Answer:
1
Step-by-step explanation:
There are 8 marbles.
All marbles are red.
p(red) = 8/8 = 1
Answer: 1
Answer: The minimum score a person must have to qualify for the society = 147.4
Step-by-step explanation:
Let X be the test scores.
As per given,
X is normally distributed.
Mean 


The minimum score a person must have to qualify for the society = 147.4
Answer: b= 30
Step-by-step explanation: