Statistics - Mathematics Jamb Past Questions and Answers

Question 61 :

• JAMB 2014

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. \(\frac{7!}{2!5!}\)

Question 62 :

• JAMB 2014

\(\begin{array}{c|c}
Numbers & 1 & 2 & 3 & 4 & 5 & 6 \\
\hline
Frequency & 18 & 22 & 20 & 16 & 10 & 14
\end{array}\)
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. \(\frac{3}{4}\)

Question 63 :

• JAMB 2014

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. \(\frac{2}{5}\)

Question 64 :

• JAMB 2014

The pie chart above shows the monthly distribution of a man's salary on food items. If he spent N8,000 on rice, how much did he spent on yam?

A. N42,000
B. N18,000
C. N16,000
D. N12,000

Question 65 :

• JAMB 2013

Find the mean of t + 2, 2t - 4, 3t + 2 and 2t.

A. T + 1
B. 2t
C. 2t + 1
D. T