STATISTICS - Jamb Mathematics Past Questions and Answers

Question 351:

• JAMB 2020

A crate of soft drinks contains 10 bottle of Coca-Cola 8 of Fanta and 6 of Sprite. If one bottle is selected at random, what is the probability that it is Not a Coca-Cola bottle?

A. \(\frac{5}{12}\)
B. \(\frac{1}{3}\)
C. \(\frac{3}{4}\)
D. \(\frac{7}{12}\)

Question 352:

• JAMB 2020

Calculate the standard deviation of the following data: 7, 8, 9, 10, 11, 12, 13

A. 2
B. 4
C. 12
D. 17

Question 353:

• JAMB 2020

A number is selected at random between 20 and 30, both numbers inclusive. Find the probability that the number is a prime.

A. \(\frac{2}{11}\)
B. \(\frac{5}{11}\)
C. \(\frac{6}{11}\)
D. \(\frac{8}{11}\)

Question 354:

• JAMB 2020

The pie chart shows the income of a civil servant in month. If his monthly income is N6,000. Find his monthly basic salary.

A. N2,050
B. N2600
C. N3,100
D. N3,450

Question 355:

• JAMB 2020

The mean age group of some students is 15years. When the age of a teacher, 45 years old, is added to the ages of the students, the mean of their ages become 18 years. Find the number of students in the group.

A. 7
B. 9
C. 15
D. 42