How good are you with figures and formulas? Find out with these Mathematics past questions and answers. This Test is useful for both job aptitude test candidates and students preparing for JAMB, WAEC, NECO or Post UTME.
\(\frac{2}{27}\)
\(\frac{3}{27}\)
\(\frac{4}{27}\)
\(\frac{5}{3}\)
Correct answer is C
Pass(P) = \(\frac{2}{3}\), Fail(F) = \(\frac{1}{3}\)
T = P.P.F ==> \(\frac{2}{3} \times \frac{2}{3} \times \frac{1}{3}\) = \(\frac{4}{27}\)
In how many ways can the letters of the word TOTALITY be arranged?
6720
6270
6207
6027
Correct answer is A
\(\frac{8!}{3!}\)
\(\frac{8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{3 \times 2\times 1}\)
==> 8 x 7 x 6 x 5 x 4 = 6720
3630
3360
1120
560
Correct answer is D
\(\frac{n + 1 (n - 2)}{(n + 1)!}\)
\(\frac{(n + 1) + (n - 2)!(n - 2)!}{(n + 1)!}\)
\(\frac{(n + 1)(n + 1 -1)(n+1-2)(n+1-3)!}{3!(n-2)!}\)
\(\frac{(n + 1)(n)(n-1)(n-2)!}{3!(n-2)!}\)
\(\frac{(n + 1)(n)(n-1)}{3!}\)
Since n = 15
\(\frac{(15 + 1)(15)(15-1)}{3!}\)
\(\frac{16 \times 15 \times 14}{3 \times 2 \times 1}\)
= 560
Find the standard deviation of 2,3,8,10 and 12
3.9
4.9
5.9
6.9
Correct answer is A
\(\begin{array}{c|c} x & (x - \varkappa) & (x - \varkappa)^2 \\ \hline 2 & -5 & 25 \\ \hline 3 & -4 & 16 \\ \hline 8 & 1 & 1 \\ \hline 10 & 3 & 9 \\ \hline 12 & 5 & 25 \\ \hline & & 76
\end{array}\)
S.D = \(\sqrt{\frac{(x - \varkappa)^2}{n}}\)
S.D = \(\sqrt{\frac{76}{5}}\)
S.D = 3.9
Find the range of 4,9,6,3,2,8,10 and 11
11
9
8
4
Correct answer is B
Range = Highest Number - Lowest Number
Range = 11 - 2 = 9