WAEC Mathematics Past Questions & Answers - Page 297

1,481.

The data below shows the number of workers
employed in the various sections of a construction
company in Lagos.

Carpenters 24 Labourers 27
Plumbers 12 Plasterers 15
Painters 9 Messengers 3
Bricklayers 18


If a worker is retrenched, what is the probability that he is a plumber or plasterer.

A.

1/27

B.

1/9

C.

5/36

D.

1/4

E.

3/4

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,482.

The data below shows the number of workers
employed in the various sections of a construction
company in Lagos.

Carpenters 24 Labourers 27
Plumbers 12 Plasterers 15
Painters 9 Messengers 3
Bricklayers 18


If one of the workers is absent on a certain day,
what is the probability that he is a bricklayer?

A.

1/12

B.

1/9

C.

2/9

D.

1/6

E.

1/4

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.

1,483.

Three balls are drawn one after the other with replacement, from a bag containing 5 red, 9white and 4 blue identical balls, What is the probability that they are one red, one white and one blue?

A.

5/102

B.

5/136

C.

5/162

D.

5/204

E.

5/243

View answer & explanation

Correct answer is C

Total number of balls = 18
P(1R, 1W, 1B) = 5/18 x 9/18 x 4/18 = 5/162

1,484.

A fair die is rolled once. What is the probability of obtaining 4 or 6?

A.

1/12

B.

1/6

C.

1/3

D.

1/2

E.

2/3

View answer & explanation

Correct answer is C

No explanation has been provided for this answer.

1,485.

What is the probability of throwing a number greater than 2 with a single fair die

A.

1/6

B.

1/3

C.

1/2

D.

2/3

E.

5/6

View answer & explanation

Correct answer is D

No explanation has been provided for this answer.


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