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Mathematics JAMB Past Questions

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531
Find the standard deviation of 5, 4, 3, 2, 1
  • A. \(\sqrt{2}\)
  • B. \(\sqrt{3}\)
  • C. \(\sqrt{6}\)
  • D. \(\sqrt{10}\)
View Answer & Discuss JAMB 2014
532
In how many ways can a team of 3 girls be selected from 7 girls?
  • A. \(\frac{7!}{3!}\)
  • B. \(\frac{7!}{4!}\)
  • C. \(\frac{7!}{3!4!}\)
  • D. \(\frac{7!}{2!5!}\)
View Answer & Discuss (3) JAMB 2014
533
\(\begin{array}{c|c}
Numbers & 1 & 2 & 3 & 4 & 5 & 6 \\
\hline
Frequency & 18 & 22 & 20 & 16 & 10 & 14
\end{array}\)

The table above represents the outcome of throwing a die 100 times. What is the probability of obtaining at least a 4?
  • A. \(\frac{1}{5}\)
  • B. \(\frac{1}{2}\)
  • C. \(\frac{2}{5}\)
  • D. \(\frac{3}{4}\)
View Answer & Discuss (4) JAMB 2014
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534

A number is chosen at random from 10 to 30 both inclusive. What is the probability that the number is divisible by 3?

  • A. \(\frac{2}{15}\)
  • B. \(\frac{1}{10}\)
  • C. \(\frac{1}{3}\)
  • D. \(\frac{2}{5}\)
View Answer & Discuss (4) JAMB 2014
535
Convert 2710 to another number in base three
  • A. 10013
  • B. 10103
  • C. 11003
  • D. 10003
View Answer & Discuss JAMB 2013
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