Of the students in a class 3/5 play musical instruments. if 12 students play instruments, then how many students are in the class.

What are the soultion(s) to the quadratic equation 40- x^2=0

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?