Mathematics Past Questions

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1726

Class interval	1 - 5	6 - 10	11 - 15	16 - 20	21 - 25
Frequency	6	15	20	7	2

Estimate the median of the frequency distribution above

A. 10\(\frac{1}{2}\)
B. 11\(\frac{1}{2}\)
C. 12
D. 13

View Answer & Discuss (7) JAMB 1994

1727

\(\begin{array}{c|c} x & 1 & 2 & 3 & 4 & 5 \\ \hline f & 2 & 1 & 2 & 1 & 2\end{array}\)
Find the variance of the frequency distribution above

A. \(\frac{3}{2}\)
B. \(\frac{9}{4}\)
C. \(\frac{5}{2}\)
D. 3

View Answer & Discuss (3) JAMB 1994

1728

In a survey, it was observed that 20 students read newspapers and 35 read novels. If 40 of the students read either newspapers or novels, what is the probability of the students who read both newspapers and novels?

A. \(\frac{1}{2}\)
B. \(\frac{2}{3}\)
C. \(\frac{3}{8}\)
D. \(\frac{3}{11}\)

View Answer & Discuss (5) JAMB 1994

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1729

change 71₁₀ to base 8

A. 107₈
B. 106₈
C. 71₈
D. 17₈

View Answer & Discuss JAMB 1993

1730

Evaluate \(\frac{3524}{0.05}\) correct to 3 significant figures

A. 705
B. 70,000
C. 70, 480
D. 70, 500

View Answer & Discuss (3) JAMB 1993

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