Suppose a statistics class contains five freshmen, ten sophomores, ten junior students, and ten senior students. randomly pick up 4 students from the class to form a study group. what is the probability that the study group contains exactly one freshman, one sophomore, one junior, and one senior?

The probability is 0.0955

Step-by-step explanation:

The number of ways in which we can select k elements from n elements in which the order is not important is given by combinations and it is calculated as:

So, the total number of ways in which we can select 4 students from the 35 in the statistics class are:

From this, the number of ways in which there are exactly one freshman, one sophomore, one junior and one senior are calculated as:

5C1 * 10C1 * 10C1 * 10C1 = 5,000

Because:

So, the probability is calculated as a division between the number of ways in which there are exactly one freshman, one sophomore, one junior and one senior and the total number of ways in which we can select 4 students from the 35 in the statistics class. This is:

i dont know i just need points

connie < felicia < stew

step-by-step explanation:

stew:

we need to find the slope

m = (y2-y1)/ (x2-x1)

    = (2650-795)/(10-3)

    = 1855/7

265 words per minute

connie:

we need to find the slope

m = (y2-y1)/ (x2-x1)

we have two points (0,0) and (4,800)

m = (800-0)/(4-0)

  m = 800/4

    200 words per minute

felicia:

260 words per minute

200< 260 < 265

connie < felicia < stew