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A sample of 120 votes were cast for five contestants. The table shows the votes received by four of them. Calculate the number of votes for Dalaba and determine the winner.

Mathematics

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Step-by-step solution

3 steps

Step 1: Find the number of votes acquired by Dalaba.
The total votes cast are 120. The votes for each contestant are given in the table.
Let xx be the number of votes for Dalaba.
The sum of all votes must equal the total votes.

14+11+x+52+24=12014 + 11 + x + 52 + 24 = 120 101+x=120101 + x = 120

Subtract 101 from both sides:

x=120−101x = 120 - 101 x=19x = 19

Therefore, Dalaba acquired 19 votes.

Part a· 2 steps

The number of votes acquired by Dalaba is 19 votes\boxed{\text{19 votes}}.

  1. Prepare data for the pie chart and identify the winner.

    Now we have the votes for all contestants:

    • Agbeke: 14 votes
    • Katume: 11 votes
    • Dalaba: 19 votes
    • Dramani: 52 votes
    • Quainoo: 24 votes Total votes: 120

    To draw a pie chart, we need to calculate the angle for each contestant's sector. The total angle in a circle is 360∘360^\circ.
    Angle for each contestant =(Number of votesTotal votes)×360∘= \left(\frac{\text{Number of votes}}{\text{Total votes}}\right) \times 360^\circ.

    • Agbeke: 14120×360∘=14×3∘=42∘\frac{14}{120} \times 360^\circ = 14 \times 3^\circ = 42^\circ
    • Katume: 11120×360∘=11×3∘=33∘\frac{11}{120} \times 360^\circ = 11 \times 3^\circ = 33^\circ
    • Dalaba: 19120×360∘=19×3∘=57∘\frac{19}{120} \times 360^\circ = 19 \times 3^\circ = 57^\circ
    • Dramani: 52120×360∘=52×3∘=156∘\frac{52}{120} \times 360^\circ = 52 \times 3^\circ = 156^\circ
    • Quainoo: 24120×360∘=24×3∘=72∘\frac{24}{120} \times 360^\circ = 24 \times 3^\circ = 72^\circ

    Check sum of angles: 42∘+33∘+57∘+156∘+72∘=360∘42^\circ + 33^\circ + 57^\circ + 156^\circ + 72^\circ = 360^\circ.

  2. Draw the pie chart.

Part b· 1 step

To draw the pie chart

  1. Draw a circle using a compass.
  2. Mark the center of the circle.
  3. Draw a radius from the center to the circumference.
  4. Using a protractor, measure and draw the angles for each contestant from the previous radius.
    • Agbeke: 42∘42^\circ
    • Katume: 33∘33^\circ
    • Dalaba: 57∘57^\circ
    • Dramani: 156∘156^\circ
    • Quainoo: 72∘72^\circ
  5. Label each sector with the contestant's name and their number of votes or percentage.
  1. Calculate the percentage of votes for the winner.

    The winner is the contestant with the highest number of votes.
    Comparing the votes: Agbeke (14), Katume (11), Dalaba (19), Dramani (52), Quainoo (24).
    Dramani has the highest number of votes (52), so Dramani is the winner.

    To find the percentage of total votes the winner obtained:

    Percentage=(Winner’s votesTotal votes)×100%\text{Percentage} = \left(\frac{\text{Winner's votes}}{\text{Total votes}}\right) \times 100\% Percentage=(52120)×100%\text{Percentage} = \left(\frac{52}{120}\right) \times 100\% Percentage=5200120%=52012%=1303%\text{Percentage} = \frac{5200}{120}\% = \frac{520}{12}\% = \frac{130}{3}\% Percentage≈43.33%\text{Percentage} \approx 43.33\%

Part c

The winner obtained 43.33%\boxed{\text{43.33\%}} of the total votes.

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