WAEC Past Questions and Answers - Page 1106

5,526.

Which of the following is not a petty cash book item? purchase of

A.

Stationery

B.

Postage stamps

C.

Cutlass for gardeners

D.

Machinery

Correct answer is D

No explanation has been provided for this answer.

5,527.

Two forces \(F_{1} = (10N, 020°)\) and \(F_{2} = (7N, 200°)\) act on a particle. Find the resultant force.

A.

(3 N, 020°)

B.

(3 N, 200°)

C.

(17 N, 020°)

D.

(17 N, 200°)

Correct answer is A

No explanation has been provided for this answer.

5,528.

The probability of Jide, Atu and Obu solving a given problem are \(\frac{1}{12}\), \(\frac{1}{6}\) and \(\frac{1}{8}\) respectively. Calculate the probability that only one solves the problem.

A.

\(\frac{1}{576}\)

B.

\(\frac{55}{576}\)

C.

\(\frac{77}{576}\)

D.

\(\frac{167}{576}\)

Correct answer is D

\(P(Jide) = \frac{1}{12}; P(\text{not Jide}) = \frac{11}{12}\)

\(P(Atu) = \frac{1}{6}; P(\text{not Atu}) = \frac{5}{6}\)

\(P(Obu) = \frac{1}{8}; P(\text{not Obu}) = \frac{7}{8}\)

\(P(\text{only one of them}) = P(\text{Jide not Atu not Obu}) + P(\text{Atu not Jide not Obu}) + P(\text{Obu not Jide not Atu})\)

= \((\frac{1}{12} \times \frac{5}{6} \times \frac{7}{8}) + (\frac{1}{6} \times \frac{11}{12} \times \frac{7}{8}) + (\frac{1}{8} \times \frac{11}{12} \times \frac{5}{6})\)

= \(\frac{35}{576} + \frac{77}{576} + \frac{55}{576}\)

= \(\frac{167}{576}\)

5,529.

Given that \(\overrightarrow{AB} = 5i + 3j\) and \(\overrightarrow{AC} = 2i + 5j\), find \(\overrightarrow{BC}\). 

A.

-7i - 8j

B.

-3i + 2j

C.

3i - 2j

D.

3i + 8j

Correct answer is B

\(\overrightarrow{BC} = \overrightarrow{BA} + \overrightarrow{AC}\)

\(\overrightarrow{BA} = - \overrightarrow{AB} = -(5i + 3j)\)

= \(-5i - 3j\)

\(\overrightarrow{BC} = (-5i - 3j) + (2i + 5j)\)

= \(-3i + 2j\)

5,530.

In computing, ALU stands

A.

Accounting logic unit

B.

Arithmetic logic unit

C.

Access logic unit

D.

Additional liability unit

Correct answer is B

No explanation has been provided for this answer.