NECO Mathematics Past Questions & Answers - Page 11

51.

Find the standard deviation of the numbers 6, 9, 10, 8 and 7

A.

1.4

B.

2

C.

2.4

D.

5

E.

8

Correct answer is A

No explanation has been provided for this answer.

52.

If 7 is subtracted from twice a certain number x, the result is at most 5. What is the range of the number?

A.

x < 2

B.

x < 3

C.

x < 4

D.

x < 5

E.

x < 6

Correct answer is E

No explanation has been provided for this answer.

53.

If log 3 = 0.4771 and log 2 = 0.3010, what is the value of log 12?

A.

0.0432

B.

0.4322

C.

1.0791

D.

1.2552

E.

1.5225

Correct answer is C

No explanation has been provided for this answer.

54.

If a = {x : 1 < x < 9} ; b = {x : 0 < x < 9} ; C = {x : 2 x < 9} and a, b, c U, what are the elements in U?

A.

U = {-1 < x < 9}

B.

U = {0 < x < 9}

C.

U = {1 < x < 9}

D.

U = {1 < x < 10}

E.

{2 < x < 10}

Correct answer is C

No explanation has been provided for this answer.