Fill in the blank so that the ratios are equivalent. : 6 and 7:2​

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Afamily has five members. a mom, a dad, two sisters, & a brother. the family lines up single file. what is the probabillity that the mom is at the front of the line

In a class of 77, there are 44 students who play soccer. if the teacher chooses 33 students, what is the probability that none of the three of them play soccer?