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.
48
24
20
10
Correct answer is B
= \((n - 1)!\) ways.
= \((5 - 1)! \) ways
= 24 ways.
\(\frac{1}{96}\)
\(\frac{1}{8}\)
\(\frac{5}{6}\)
\(\frac{11}{12}\)
Correct answer is D
Prob of P = \(\frac{3}{4}\)
Prob of Q = \(\frac{1}{6}\)
Prob of both P or Q = \(\frac{3}{4} + \frac{1}{6} = \frac{11}{12}\)
Two perfect dice are thrown together, Determine the probability of obtaining a total score of 8
\(\frac{1}{12}\)
\(\frac{5}{36}\)
\(\frac{1}{6}\)
\(\frac{7}{36}\)
Correct answer is B
\(\begin{array}{c|c} & & 1 & 2 & 3 & 4 & 5 & 6 \\ \hline a & 1 & 1, 1 & 1, 2 & 1, 3 & 1, 4 & 1, 5 & 1, 6\\\hline & 2 & 1,1 & 2, 2 & 2, 3 & 2, 4 & 2, 5 & 2, 6 \\\hline B & 3 & 3, 1 & 3, 2 & 3, 3 & 3, 4 & 3, 5 & 3, 6\\\hline & 4 & 4 , 1 & 4, 2 & 4, 3 & 4, 4 & 4, 5 & 4, 6\\\hline Die & 5 & 5, 1 & 5, 2 & 5, 3 & 5, 4 & 5, 5 & 5, 6 \\\hline & 6 & 6, 1 & 6, 2 & 6, 3 & 6, 4 & 6, 5 & 6, 6\end{array}\)
Probability of obtaining total score of 8 = \(\frac{5}{36}\)
If the scores of 3 students in a test are 5, 6 and 7, find the standard deviation of their scores
\(\frac{2}{3}\)
\(\frac{2}{3}\sqrt{3}\)
\(\sqrt{\frac{2}{3}}\)
\(\sqrt{\frac{3}{2}}\)
Correct answer is C
(x) = \(\frac{5 + 6 + 7}{3}\)
= \(\frac{18}{3}\)
= 6
\(\begin{array}{c|c} scores(X) & \text{d = (x - x) deviation} & (deviation)^2\\\hline 5 & 5 - 6 & 1\\ 6 & 6 - 6 & 0 \\ 7 & 7 - 6 & 1\\ \hline & & 2\end{array}\)
S.D \(\sqrt{\frac{\sum d^2}{n}}\) where d = deviation = (x - x)
= \(\sqrt{\frac{2}{3}}\)
2, 1
1, 2
1, 5
5, 2
Correct answer is B
From the table, the mode = 1.
The median = 2.