In a class, average height of all students is '$a$ ' cms. Among them, average height of $10$ students is '$b$' cms and the average height of the remaining students is '$c$' cms. Find the number of students in the class. (Here $a>c$ and $b>c$ )
In a class, average height of all students is '$a$ ' cms. Among them, average height of $10$ students is '$b$' cms and the average height of the remaining students is '$c$' cms. Find the number of students in the class. (Here $a>c$ and $b>c$ )
- A
$\frac{(a(b-c))}{(a-c)}$
- B
$\frac{(b-c)}{(a-c)}$
- C
$\frac{(b-c)}{10(a-c)}$
- D
$\frac{10(b-c)}{(a-c)}$
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