Answer:
69
Step-by-step explanation:
Answer:
Step-by-step explanation:
22/7x7^2=154
22/7x3^2=28(approx)
154-28=126
The ans is B because 3/4=1876 is a proportions
Answer: 4.75%.
Step-by-step explanation:
Given: The mean weight
of 500 college students is 70 kg and the standard deviation
is 3 kg.
Let X be the number of students weight over 75 kg.
If the weight is normally distributed, then the probability that students weigh over 75 kg:

Hence, the percentage of students weigh over 75 kg = 4.75%.