Hey gm can i get some help plz on this

21 songs

Step-by-step explanation:

Let's figure out how many are R&B songs first.

We know that 1/4 of the 28 total songs are R&B. Remember that in mathematics, "of" usually means to multiply, so we multiply 1/4 by 28:

1/4 * 28 = 7 songs

So, 7 songs are R&B. This means that since the rest are rap, we can subtract 7 from the total 28:

28 - 7 = 21 songs

4/6 = 2/3

so it should take 3/3 hours per man. so 9 hours is the answer 3*3 =9

step-by-step explanation:

a is the right answer