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2018 WAEC Mathematics Theory (a) Mr John paid N4,800.00 in N1.00 ordinary shares of a company which sold at...

Mathematics
WAEC 2018

(a) Mr John paid N4,800.00 in N1.00 ordinary shares of a company which sold at N2.50 per share. If dividend was declared at 25k per share, how much dividend did he get?


(b) Using the method of completing the square, solve \(\frac{1 - x}{x} + \frac{x}{1 - x} = \frac{5}{2}\)

 

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Explanation

(a) The quantity of shares bought \(\frac{8400}{2.5}\) = 3360 shares. Therefore, the dividend the man received is 3360 X 0.25 = N840.00.


(b) Clearing fractions and simplifying they got the quadratic equations 9x\(^2\) - 9x + 2 = 0. Next, dividing by 9 and adding the square of the coefficient of x to both sides yields (x - \(\frac{1}{2}\))\(^2\) = \(\frac{1}{4} - \frac{2}{9}\).

Then, taking square root and solving for x 

To obtain x = \(\frac{2}{3}\) or x = \(\frac{1}{3}\)


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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709