Question

If the 2 height of boys in a hall is 180 cm and that of girls is 150 cm. If the 2 height of the gathering is 165 cm, then find the number of girls present in the hall if the number of boys present in the hall are 78 ?
A) 56
B) 64
C) 87
D) 78

Answer 1

Answer:

Step-by-step explanation:

D) 78  

Explanation:

Using Trial and error method,

we get the number of girls in the hall = 78