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STATISTICS - Jamb Mathematics Past Questions and Answers

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Jamb Mathematics Past Questions

Jamb Past Questions and Answers on STATISTICS

Question 146:


If the scores of 3 students in a test are 5, 6 and 7, find the standard deviation of their scores

A. \(\frac{2}{3}\)
B. \(\frac{2}{3}\sqrt{3}\)
C. \(\sqrt{\frac{2}{3}}\)
D. \(\sqrt{\frac{3}{2}}\)


Question 147:


Two perfect dice are thrown together, Determine the probability of obtaining a total score of 8

A. \(\frac{1}{12}\)
B. \(\frac{5}{36}\)
C. \(\frac{1}{6}\)
D. \(\frac{7}{36}\)


Question 148:


The probability of an event P is \(\frac{3}{4}\) while that of another event Q is \(\frac{1}{6}\). If the probability of both P and Q is \(\frac{1}{2}\). What is the probability of either P or Q.

A. \(\frac{1}{96}\)
B. \(\frac{1}{8}\)
C. \(\frac{5}{6}\)
D. \(\frac{11}{12}\)


Question 149:


Five people are to be arranged in a row for a group photograph. How many arrangements are there if a married couple in the group insist on sitting next to each other?

A. 48
B. 24
C. 20
D. 10


Question 150:


Quantities in the proportions 1, 4, 6, 7 are to be represented in a pie chart. Calculate the angle of the sector with proportion 7

A. 20o
B. 80o
C. 120o
D. 140o






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