In an examination hall 144 people were present. of these 1/2 were boys and of them 4/9 were girls. The rest were teachers. How many students were there in the hall?

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Step-by-step explanation:Given:–In an examination hall 144 people were present. of these 1/2 were boys and of them 4/9 were girls. The rest were teachers.

Tofind:–How many students were there in the hall?

Solution:–Given that

Total number of people were present in the examination hall = 144

Number of boys = 1/2 of the total people

=> (1/2)×144

=> 144/2

=> 72

Total number of boys = 72

Total number of girls = 4/9 of the total people

=> (4/9)×144

=> (4×144)/9

=> 4×16

=> 64

Number of girls = 64

Total number of boys and girls = 72+64 = 136Total number of teachers

=> 144-136

=>8

Number of teachers = 8

(or)

Total people present in the examination hall

=> boys+girls+teachers

=> (144/2)+(4×144/9)+ Teachers = 144

=> Teachers = 144 – (144/2)-(4×144/9)

=> Teachers = 144 -72-64

=> Teachers = 144 – 136

Number of teachers = 8

Answer:–Total number of students were present in the examination hall =

136