A local fast-food restaurant is running a "Draw a three, get it free" lunch promotion. After
each customer orders, a touch-screen display shows the message, "Press here to win a free
lunch." A computer program then simulates one card being drawn at random from a
standard deck of playing cards. If the chosen card is a 3, the customer's order is free. (Note
that the probability of drawing a 3 from a standard deck of playing cards is 4/52.)
Otherwise, the customer must pay the bill. Suppose that 250 customers place lunch orders
on the first day of the promotion. Let X = the number of people who win a free lunch.
7. Explain why X is a binomial random variable.
8. There are 10 winners on the first day of the promotion. What is the probability of this
occurring?
9. Find the mean of X. Interpret this value in context.
10. Find the standard deviation of X. Interpret this value in context.

I need the answer to this question t.

Step-by-step explanation:

christopher is 272,195 year old

step-by-step explanation:

region b will make the inequalities y < 2x + 1 and y > -x - 2 true ⇒ answer a

step-by-step explanation:

* lets study the graph and the inequality to solve the question

- the inequality y > -x - 2

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = -2 that means the line intersect the y-axis at point (0 , -2)

∵ the sign of the inequality is >

∴ we shad the part over the line

  region a and b

- the inequality y < 2x + 1

∵ the form of the inequality is y > mx + c , m is the slope of the line

  and c is the y-intercept (the line intersect y-axis at point (0 , c)

∴ c = 1 that means the line intersect the y-axis at point (0 , 1)

∵ the sign of the inequality is <

∴ we shad the part under the line

  region b and c

∵ the common region between the two lines is region b

∴ region b will make the inequalities y < 2x + 1 and y > -x - 2 true