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.
\(\frac{7}{3}\)
\(\frac{2}{3}\)
\(\frac{1}{3}\)
\(\frac{3}{10}\)
Correct answer is D
No explanation has been provided for this answer.
4.0
3.4
3.2
3.0
Correct answer is B
Median = \(\frac{a + b}{fm}\) (\(\frac{1}{2} \sum f - CF_b\))
= 2.95 + \(\frac{0.5}{15}\)(2.-7)
= 2.95 + \(\frac{0.5}{15}\) x 13
= 2.95 + 0. 43
= 3.38
= 3.4
3.2
3.3
3.7
4.2
Correct answer is B
Mode = a + (b - a)(fm - Fb)
2Fm - Fa - Fb
= 3.0 + \(\frac{(3.4 - 3)(15 - 4)}{2(15) - 4 - 10}\)
= 3 + \(\frac{(6.4)(11)}{30 - 14}\)
= 3 + \(\frac{4.4}{16}\)
= 3 + 0.275
= 3.275
= 3.3cm
The variance of the scores 1, 2, 3, 4, 5 is
1, 2
1, 4
2.0
3.0
Correct answer is C
| \(x\) | 1 | 2 | 3 | 4 | 5 | sum =15 |
| \(x - \bar{x}\) | -2 | -1 | 0 | 1 | 2 | |
| \((x - \bar{x})^{2}\) | 4 | 1 | 0 | 1 | 4 | 10 |
Mean = \(\frac{15}{5} = 3\)
\(Variance = \frac{\sum (x - \bar{x})^{2}}{n}\)
= \(\frac{10}{5}\)
= \(2.0\)
5
\(\sqrt{6}\)
\(\frac{5}{3}\)
\(\sqrt{5}\)
Correct answer is D
\(\begin{array}{c|c} \text{class intervals} & Fre(F) & \text{class-marks(x)} & Fx & (x - x)& (x - x)^2 & F(x - x)^2 \\ \hline 1 - 3 & 5 & 2 & 10 & -3 & 9 & 45\\ 4 - 6 & 8 & 5 & 40 & 0 & 0 & 0 \\ 7 - 9 & 5 & 8 & 40 & 3 & 9 & 45 \\ \hline & 18 & & 90 & & & 90 \end{array}\)
x = \(\frac{\sum fx}{\sum f}\)
= \(\frac{90}{18}\)
= 5
S.D = \(\frac{\sum f(x - x)^2}{\sum f}\)
= \(\frac{90}{18}\)
= \(\sqrt{5}\)