NECO Mathematics Past Questions & Answers - Page 8

36.

 

Find the mean deviation of 20, 25, 21, 27, 28, 29, to the nearest whole number

A.

2

B.

3

C.

4

D.

5

E.

6

Correct answer is B

No explanation has been provided for this answer.

37.

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

Correct answer is C

No explanation has been provided for this answer.

38.

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.

\(\frac{2}{15}\)

Correct answer is C

No explanation has been provided for this answer.

40.

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

Correct answer is D

No explanation has been provided for this answer.