Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Miss Molly surveyed her class of 30 students about their favorite color. Half of the class answered green, one-third of the girls answered pink, and the rest of the class answered yellow. If there are 18 girls in the class, how many students like yellow best?

### Response:
 30/2 = <<30/2=15>>15 wanafunzi walijibu kijani.
18/3 = <<18/3=6>>6 wasichana walijibu pink.
Hivyo, 15 + 6 = <<15+6=21>>21 walijibu kijani au pink.
Hivyo, 30 - 21 = <<30-21=9>>9 walijibu njano.
Hivyo, 9 walijibu njano kwa sababu ilikuwa rangi yao pendwa.