Let x be the discrete random variable whose value is the number of successes in n trials.
The probability distribution function for x of the binomial distribution B(n,p) is defined as
Given that the random sample size is 
let x represent number of customers who purchase running shoes
Let "p" be the probability of customers in a sporting goods store purchase a pair of running shoes.
It is given that 70% of the customers in a sporting goods store purchase a pair of running shoes.
Thus 
Thus the Probability distribution of x is given by
, where 
3.14 x 3 =9.42
8 x 4 = 32
32-9.42= 22.58cm squared
I think this is correct, I’m not sure
Answer: The required markup percentage is 60%.
Step-by-step explanation: Given that the store bought a pair of shoes for $50 and sold it for $80.
We are to find the markup percentage.
The markup price of the pair of shoes is given by
Therefore, the markup percentage is given by
Sorry if i was wrong. But this soulution makes since so i think im right! Also please brainlest!
First insert 4 into the place of every z. Making the problem 7(4) -4. Next multiply 7 and 4 to get 28, then simply subtract 4. Your answer will be 24
