Could you answer the question number b

Question

asked Mar 26, 2023 133k views

2 Answers

Tsukasa · Answer 1 · 2023-03-28T01:48:24+0000

Answer:

Grade A 2:9

Grade B 1:3

Grade C 4:15

Explanation:

Students in grade A:

450-(120+80)=450-200=250

if the ratio is 2:3 then

A=(250/5)(2)=(50)(2)=100 students

The ratio of students with grade A:

(100)/(450)=(10)/(45) =(2)/(9)

=
2:9

Students with grade B.

B=250-100=150

The ratio of B:

(150)/(450) =(15)/(45) =(1)/(3)

= 1:3

Ratio of students with grade C:

=(120)/(450) =(12)/(45) =(4)/(15)

=4:15

Hope this helps