The denominator is 40
10-3=7 (number of students in the band who do not ride the bus)
7/40=0.175
0.174*100=17.5% chance
Hope this helps!
A counter-example could be
There are more than 3 marbles in the bag, and the other ones are red.
Hope this helps!
Your anwser is c. Y>1 y-x>0
2 ( k-5) 13 you don't need two k-5 you can simplify it so you just know to do it twice