RRB RPF RPSF SI and CONS Model Papers 1 with solutions

Question : 30 of 120

Marks: +1, -0

In a school, the ratio of boys to girls is 4 : 3 and the ratio of girls to teachers is 8 : 1. The ratio of student to teachers is :

Solution:

(a)

\table \boys,:,\girls,\girls,:,\teacher;4,:,3,8,:,1

so,

\table \boys,:,\girls,:,\teacher;4,:,3;,,8,:,1; –––––––––,,–––––––––,,–––––––––; (4×8)=32,:,(3×8)=24,:,(3×1)=3;–––––––––,,–––––––––,,–––––––––

So, Student : teacher
⇒ (boys + girls) :teacher=(32 + 24) : 3=56 : 3

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