Jamb Mathematics Past Questions For Year 1997

Question 36

\(\begin{array}{c|c} Age & 20 & 25 & 30 & 35 & 40 & 45\\ \hline Number of people & 3 & 5 & 1 & 1 & 2 & 3\end{array}\)

Find the median age of the frequency distribution in the table above.

jamb 1997

• A. 20
• B. 25
• C. 30
• D. 35

Question 37

Find the difference between the range and the variance of the following set of numbers 4, 9, 6, 3, 2, 8, 10, 5, 6, 7 where \(\sum d^2\) = 60

jamb 1997

• A. 2
• B. 3
• C. 4
• D. 6

Question 38

In a basket of fruits, there are 6 grapes, 11 bananas and 13 oranges, if one fruit is chosen at random, what is the probability that the fruit is either a grape or a banana?

jamb 1997

• A. \(\frac{17}{30}\)
• B. \(\frac{11}{30}\)
• C. \(\frac{6}{30}\)
• D. \(\frac{5}{30}\)

Question 39

A number is selected at random between 10 and 20, both numbers inclusive. Find the probability that the number is an even number

jamb 1997

• A. \(\frac{5}{11}\)
• B. \(\frac{1}{2}\)
• C. \(\frac{6}{11}\)
• D. \(\frac{7}{10}\)

Question 40

Find the standard derivation of the following data -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5

jamb 1997

• A. 2
• B. 3
• C. \(\sqrt{10}\)
• D. \(\sqrt{11}\)