Consider a population with 3 observations: 6, 10 and 12. You use simple random sampling without replacement to select a sample of 2 observations. What is the probability that the sample mean is 9 or larger

probability = 2/3

Step-by-step explanation:

given data

population with 3 observations = 6, 10 and 12

solution                                            

Sample space of select 2 number without a replacement will be as

Sample space = {(6,10),(6,12),(10,12)}                            

so here in two cases is =  (6,12),(10,12)

that is mean is greater than or equal to 9 (9 and 11 respectively)

so we can say probability is = 2/3

probability = 2/3

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

the line of