The mean of a normal distribution is 400 pounds. The standard deviation is 10 pounds. What is the probability of a weight between 415 pounds and the mean of 400 pounds

The probability is

Step-by-step explanation:

From the question we are told that

   The population mean is  

   The  standard deviation is  

   The considered values are  

Given that the weight follows a normal distribution

     i.e      

Now the probability of a weight between 415 pounds and the mean of 400 pounds is mathematically as

So   is equal to Z (the standardized value of  X  )

Hence we have  

substituting values

From the standardized normal distribution table   and

So

NOTE :  This above  values obtained from the standardized normal distribution table can also be obtained using the P(Z) calculator at  (calculator dot net).

70,000 + 6,000 + 800 + 30

step-by-step explanation:

47.28 or 47.2857143

step-by-step explanation:

you just divide 331 by 7 and you get that answer. ( i think so tho)