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3 years ago

PLEASE ANSWER WITH SOLUTION PLS

Mathematics

2 answers:

katen-ka-za [31]3 years ago

7 0

Answer:

whatever% of anything, is just (whatever/100) * anything.

there were a total of 560000 votes, now, off those some are valid and some are invalid.

we know 15% of that are invalid, that simply means that 85% are valid, since 85% + 15% is the whole thing, or 100%, if 15% are not good, the other 85% are the good ones.

how many are the valid ones anyway? well, 85% of 560000, which is just (85/100) * 560000.

we know that off those valid ones, the candidate got 75% of those, so how much is 75% of that?

well, (75/100) * [ (85/100) * 560000 ].

Step-by-step explanation:

Hunter-Best [27]3 years ago

4 0

Answer:

See below ↓

Step-by-step explanation:

Score of the student on examination = marks scored / total marks
Score = 235/300 [Divide throughout by 5]
Score = 47/60 [Using long division, approximate to tenths place]
Score = 0.783 [Multiply with 100 to convert decimals → percentage]
Score = <u>78.3%</u>

<u></u>

Total valid votes = 560 x (100 - 15)%
Total valid votes = 560 x 0.85
Total valid votes = 476
Votes for Magie N. Hawa = 476 x 70%
Votes for Magie N. Hawa = 333.2 ≅ <u>333 votes</u>

<u></u>

108 girls = (100 - 70)% of pupils
108 / 0.3 = number of pupils
<u>360 pupils</u>

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$\bf \qquad \qquad \textit{Future Value of an ordinary annuity}\\
\left. \qquad \qquad \right.(\textit{payments at the end of the period})
\\\\
A=pymnt\left[ \cfrac{\left( 1+\frac{r}{n} \right)^{nt}-1}{\frac{r}{n}} \right]$

$\bf \qquad 
\begin{cases}
A=
\begin{array}{llll}
\textit{accumulated amount}\\
\end{array}\to &
\begin{array}{llll}
8000
\end{array}\\
pymnt=\textit{periodic payments}\\
r=rate\to 5\%\to \frac{5}{100}\to &0.05\\
n=
\begin{array}{llll}
\textit{times it compounds per year}\\
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\end{array}\to &12\\
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\end{cases}$

$\bf 8000=pymnt\left[ \cfrac{\left( 1+\frac{0.05}{12} \right)^{12\cdot 4}-1}{\frac{0.05}{12}} \right]
\\\\\\
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\\\\\\
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