Question

Frame a formula for finding the number of students ${}^{\prime }{n}^{\prime }$ that may be seated in a class room in which there are $S$ single seats and $D$ double seats.

• A. $n=S+2D$
• B. $n=S+D$
• C. $n=1+2D$
• D. $n=2S+D$

Answer 1

The correct option is A $n=S+2D$

No of single seats = $S$

No. of students in single seats = $1S$

No. of double seats = $D$

No. of students in double seats = $2D$

Total students $\left(n\right)=S+2D$