In how many ways can 3 prefects be chosen out of 8 prefec...
In how many ways can 3 prefects be chosen out of 8 prefects?
6
24
56
336
Correct answer is C
= \(^{8}C_{3} = \frac{8!}{(8 - 3)! 3!}\)
= \(\frac{8 \times 7 \times 6}{3 \times 2}\)
= 56 ways
Evaluate: \(^{lim}_{x \to 1} \begin{pmatrix} \frac{1 - x}{x^2 - 3x + 2} \end {pmatrix}\)...
The third of geometric progression (G.P) is 10 and the sixth term is 80. Find the common ratio. ...
If \(P = \begin{pmatrix} 1 & 2 \\ 5 & 1 \end{pmatrix}\) and \(Q = \begin{pmatrix} 0 & 1 ...
Find the range of values of x for which 2x\(^2\) + 7x - 15 ≥ 0....