Answer:
Added thanks lol :)
Step-by-step explanation:
The class starts out with 26 students, of whom 12 are girls and, perhaps unlike Mr Morris, are sure of it.
The probability of the first random choice being a girl is 12/26. If successful, there are now 25 students left, of whom 11 are girls. The probability of a girl on the 2nd random choice is 11/25. The probability that BOTH random choices are successful is (12/26) x (11/25). That's (132/650), or about 20.31% (rounded).
To answer this question, you will represent the amount of yards rushed by each running back.
x - Running back #1
9x - Running back #2
The combined yards was 1550, so put these together in an addition equation with a total of 1550. Solve for x.
x + 9x = 1550
10x = 1550
x = 155
Running back #1 rushed 155 yards, and running back #2 rushed for 1395 yards.