WAEC Past Questions and Answers - Page 4042

20,206.

The table above shows the scores of a group of 40 students in a physics test

What is the mean of the distribution?

A.

4.2

B.

4.5

C.

4.8

D.

5.0

E.

5.2

Correct answer is C

x 1 2 3 4 5 6 7 8 9 Total
f 2 3 6 7 9 6 2 2 3 40
fx 2 6 18 28 45 36 14 16 27 192

Mean = \(\frac{\sum fx}{\sum f}\)

= \(\frac{192}{40}\)

= 4.8

 

20,207.

The distribution of organisms in a freshwater habitat like a stream or pond is determined by the following
except

A.

rainfall

B.

temperature

C.

soil pH

D.

light penetration

E.

tidal movements

Correct answer is C

No explanation has been provided for this answer.

20,208.
20,209.

Which of the following conditions is not necessary for photosynthesis to occur in plants?

A.

There must be light

B.

There must be xylem tissue used to conduct water

C.

There must be chlorophyll to trap radiant energy

D.

Carbondioxide must be present

E.

Water must be present

Correct answer is B

No explanation has been provided for this answer.

20,210.

What is A∩B in the diagram above?

A.

(2,3)

B.

(2,3,4)

C.

(1,2,3)

D.

(2,3,8)

E.

(6,4,7)

Correct answer is B

No explanation has been provided for this answer.