STATISTICS - Jamb Mathematics Past Questions and Answers

Question 191:

• JAMB 1998

A bag contains 16 red balls and 20 blue balls only. How many white balls must be added to the bag so that the probability of randomly picking a red ball is equal to \(\frac{2}{5}\)

A. 4
B. 20
C. 24
D. 40

Question 192:

• JAMB 1998

In a recent zonal championship games involving 10 teams, teams X and Y were given probabilities \(\frac{2}{5}\) and \(\frac{1}{3}\) respectively of winning the gold in the football event. What is the probability that either team will win the gold?

A. \(\frac{2}{15}\)
B. \(\frac{7}{15}\)
C. \(\frac{11}{15}\)
D. \(\frac{13}{15}\)

Question 193:

• JAMB 1998

If x, y can take values from the set (1, 2, 3, 4), find the probability that the product of x and y is not greater than 6

A. \(\frac{5}{8}\)
B. \(\frac{5}{16}\)
C. \(\frac{1}{2}\)
D. \(\frac{3}{8}\)

Question 194:

• JAMB 1998

The pie chart shows the monthly expenditure pf a public servant. The monthly expenditure on housing is twice that of school fees. How much does the worker spend on housing if his monthly income is N7200?

A. N1000
B. N2000
C. N3000
D. N4000

Question 195:

• JAMB 1999

The table above shows the frequency distribution of the ages (in years) of pupils in a certain secondary school. What percentage of the total number of pupils is over 15 years but less than 21 years?

A. 35%
B. 45%
C. 50%
D. 60%