17 There are 3 cinemas $\mathbf{A}, \mathbf{B}$ and $\mathbf{C}$.
The mean number of seats per cinema is 380
There are 350 seats in cinema $\mathbf{A}$.
There are 250 seats in cinema $\mathbf{B}$.
Work out the number of seats in cinema $\mathbf{C}$.

Answer

Expert–verified

Hide Steps

Answer

$\boxed{540}$

Steps

Step 1 ：Total number of seats = Mean number of seats per cinema * Total number of cinemas = $380 * 3 = 1140$

Step 2 ：Number of seats in cinema C = Total number of seats - (Number of seats in cinema A + Number of seats in cinema B) = $1140 - (350 + 250) = 540$

Step 3 ：$\boxed{540}$

17 There are 3 cinemas $\mathbf{A}, \mathbf{B}$ and $\mathbf{C}$.The mean number of seats per cinema is 380There are 350 seats in cinema $\mathbf{A}$.There are 250 seats in cinema $\mathbf{B}$.Work out the number of seats in cinema $\mathbf{C}$.

Answer

Popular Problems

17 There are 3 cinemas $\mathbf{A}, \mathbf{B}$ and $\mathbf{C}$.
The mean number of seats per cinema is 380
There are 350 seats in cinema $\mathbf{A}$.
There are 250 seats in cinema $\mathbf{B}$.
Work out the number of seats in cinema $\mathbf{C}$.