Mathematics 2008 Neco Past Questions and Answers

Question 21 :

• NECO 2008

Twenty girls and y boys sat on an examination. The mean marks obtained by the girls and boys were 52 and 57 respectively. if the total score for both girls and boys was 2750, find y.

A. 51
B. 48
C. 30
D. 25
E. 18

Question 22 :

• NECO 2008

A sector of angle 120° is cut out from a circle of radius 13.5cm. what area of the circle is remaining ? (π = \(\frac{22}{7}\))

A. 14.1cm²
B. 95.5cm²
C. 190.9cm²
D. 381.9cm²
E. 763.7cm²

Question 23 :

• NECO 2008

Two ladders of length 5m and 7m lean against a pole and make angles 45° and 60° with the ground respectively. What is their distance apart on the pole correct to two decimal places?

A. 9.60m
B. 6.06m
C. 2.54m
D. 2.53m
E. 2.00m

Question 24 :

• NECO 2008

The chances of Usman and Dele passing a Mathematics test are 12 and 13 respectively. What is the probability that neither of them passes the test?

A. \(\frac{3}{5}\)
B. \(\frac{2}{5}\)
C. \(\frac{4}{15}\)
D. \(\frac{1}{5}\)
E. \(\frac{2}{15}\)

Question 25 :

• NECO 2008

x varies directly as y and inversely as z. when x = 5, y = 2 and z = 1. What is the value of x when y = 5 and z = 2?

A. 2.5
B. 5
C. 6.25
D. 6.52
E. 7.5