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Further Mathematics questions and answers

Further Mathematics Questions and Answers

Test your knowledge of advanced level mathematics with this aptitude test. This test comprises Further Maths questions and answers from past JAMB and WAEC examinations.

331.

Simplify 2log383log32

A.

log34

B.

log32

C.

3log32

D.

3log34

Correct answer is C

2log383log32=log382log323

= log3(648)

= log38=log323

= 3log32

332.

Calculate, correct to the nearest degree, the angle between the vectors (131) and (14)

A.

58°

B.

72°

C.

74°

D.

87°

Correct answer is B

a.b=|a||b|cosθ

(131).(14)=13×1+1×4=13+4=17

17=(132+12)(12+42)cosθ

17=(170)(17)cosθ

cosθ=171710=1010=0.3162

\theta = \cos^{-1} 0.3162 = 72°

333.

Two fair dices, each numbered 1, 2, ..., 6, are tossed together. Find the probability that they both show even numbers.

A.

\frac{1}{3}

B.

\frac{1}{4}

C.

\frac{1}{6}

D.

\frac{1}{12}

Correct answer is B

P(even in 1 dice) = \frac{3}{6} = \frac{1}{2}

P(even in 2 fair die) = \frac{1}{2} \times \frac{1}{2} = \frac{1}{4}

334.

The position vectors of A and B are (2i + j) and (-i + 4j) respectively; find |AB|.

A.

3\sqrt{2}

B.

\sqrt{34}

C.

\sqrt{34}

D.

9\sqrt{2}

Correct answer is A

No explanation has been provided for this answer.

335.

Three men, P, Q and R aim at a target, the probabilities that P, Q and R hit the target are \frac{1}{2}, \frac{1}{3} and \frac{3}{4} respectively. Find the probability that exactly 2 of them hit the target.

A.

1

B.

\frac{1}{2}

C.

\frac{5}{12}

D.

\frac{1}{12}

Correct answer is C

p(P) = \frac{1}{2}, p(P') = \frac{1}{2}

p(Q) = \frac{1}{3}, p(Q') = \frac{2}{3}

p(R) = \frac{3}{4}, p(R') = \frac{1}{4}

p(exactly two hit the target) = p(P and Q and R') + p(P and R and Q') + p(Q and R and P')

= (\frac{1}{2} \times \frac{1}{3} \times \frac{1}{4}) + (\frac{1}{2} \times \frac{3}{4} \times \frac{2}{3}) + (\frac{1}{3} \times \frac{3}{4} \times \frac{1}{2})

= \frac{1}{24} + \frac{6}{24} + \frac{3}{24}

= \frac{5}{12}