Neco Mathematics Past Questions and Answers

Question 126:

• NECO 2005

A bag contains 4 blue and 8 red identical balls. If two balls are picked at random with replacement, what is the probability of picking two balls of different colours?

A. 1
B. \(\frac{13}{26}\)
C. \(\frac{5}{18}\)
D. \(\frac{4}{9}\)
E. \(\frac{2}{9}\)

Question 127:

• NECO 2005

A car dealer sells a car and makes a profit of 15%. If the car costs N320,000.00, how much did he sell the car?

A. N272,000.00
B. N296,000.00
C. N300,000.00
D. N368,000.00
E. N400,000.00

Question 128:

• NECO 2005

If A(I,2,3,...,10) ; B = (-5,-4,.....,-1) ; C = (-1, 0, 1, 2,....5) List all the elements in (B ∪ C) ∩ A

A. (-1,2,...5)
B. (-1,1,....5)
C. (1,2,..5)
D. (2,3,...10)
E. (1,2,...10)

Question 129:

• NECO 2005

What is the positive difference between the squares of 2.5 and 2.1 to 1 significant figures?

A. – 2.0
B. – 184
C. -1.84
D. 2
E. 18.4

Question 130:

• NECO 2005

Find the value of 2a - b if a + b = 8 and 4a - b = 22

A. 2
B. 4
C. 6
D. 8
E. 10