In a gym class the ratio of girls to total students is 4: 7 there are 9 boys in the gym class how many students are in the gym class

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

Let event a = you roll an even number on the first cube.let event b = you roll a 6 on the second cube.are the events independent or dependent? why?