WAEC Mathematics Past Questions & Answers - Page 313

1,561.

The population of a village is 5846. Express this number to three significant figures

A.

5850

B.

5846

C.

5840

D.

585

E.

584

Correct answer is A

5846 \(\approxeq\) 5850 (to 3 s.f.)

1,562.

Express 0.0462 in standard form

A.

0.462 x 10-1

B.

0.462 x 10-2

C.

4.62 x 10-1

D.

4.62 x 10-2

E.

4.62 x 103

Correct answer is D

4.62 x 10-2

1,563.

Two groups of male students cast their vote on a particular proposal. The results are as follows:

  In favor Against
Group A 128 32
Group B 96 48

If a student is chosen at random, what is probability that he is against the proposal?

A.

3/19

B.

4/19

C.

5/19

D.

9/19

E.

10/19

Correct answer is C

Probability that the student is against the proposal

= \(\frac{32 + 48}{128 + 32 + 96 + 48}\)

= \(\frac{80}{304}\)

= \(\frac{5}{19}\)

1,564.

Two groups of male students cast their votes on a particular proposal. The result are as follows:

  In favor Against
Group A 128 32
Group B 96 48

If a student in favor of the proposal is selected for a post, what is the probability that he is from group A?

A.

8/19

B.

16/35

C.

10/19

D.

4/7

E.

4/5

Correct answer is A

Probability that a student in favor is group A

= \(\frac{128}{128 + 32 + 96 + 48}\)

= \(\frac{128}{304}\)

= \(\frac{8}{19}\)

1,565.

The table shows that the amount of money (in naira)collected through voluntary donations in a secondary school.

What is the median of distribution

A.

N3.00

B.

N9.00

C.

N12.00

D.

N15.00

E.

N18.00

Correct answer is C

No explanation has been provided for this answer.