Mathematics 2013 JAMB Past Questions

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If the variance of 3+x, 6, 4, x and 7-x is 4 and the mean is 5, find the standard deviation

A. \(\sqrt{3}\)
B. 2
C. 3
D. \(\sqrt{2}\)

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\(\begin{array}{c|c} Score & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 \\ \hline Frequency & 1 & 0 & 7 & 5 & 2 & 3 & 1 & 1 \end{array}\)
The table above shows the scores of 20 students in further mathematics test. What is the range of the distribution?

A. 7
B. 6
C. 3
D. 10

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In how many ways can a student select 2 subjects from 5 subjects?

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

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In how many ways can 3 seats be occupied if 5 people are willing to sit?

A. 60
B. 20
C. 5
D. 120

View Answer & Discuss (2) JAMB 2013

What is the probability that an integer x \((1 \leq x \leq 25)\) chosen at random is divisible by both 2 and 3?

A. \(\frac{1}{25}\)
B. \(\frac{1}{5}\)
C. \(\frac{4}{25}\)
D. \(\frac{3}{4}\)

View Answer & Discuss (1) JAMB 2013

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