The table given below shows the number of salesman in five companies.
| Companies | Salesman |
| C1 | 35 |
| C2 | 10 |
| C3 | 30 |
| C4 | 5 |
| C5 | 15 |
What is the average number of salesman in C2, C4 and C5?
If \(
y + \frac{1}{y} = 11,
\) then what is the value of \(
\begin{aligned}
y^{3} - \frac{1}{y^{3}}
\end{aligned}
\)
If b cos θ = a, then cosec θ + cot θ =
\( \sqrt{\frac{1}{b+a}} \)
\( \sqrt{\frac{b-a}{b+a}} \)
\( \sqrt{\frac{b+a}{b-a}} \)
\( \sqrt{\frac{1}{b-a}} \)
If
\(
\left( x - \frac{1}{x} \right)^{2} = 12
\)
and given that x>0, then what is the value of
\(
\left( x^{2} - \frac{1}{x^{2}} \right)
\)
If the average of s numbers is r4 and the average of r numbers is s4, then find the average of all r + s numbers?