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Calculate the percentages for each section of the Venn diagram.

Mathematics

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Step 1: Calculate the percentages for each section of the Venn diagram.
Let MM be the set of people who ride motorcycles and SS be the set of people who ride scooters.
Given:

  • Percentage of people who ride motorcycles, n(M)=65%n(M) = 65\%
  • Percentage of people who ride scooters, n(S)=35%n(S) = 35\%
  • Percentage of people who ride both motorcycle and scooter, n(M∩S)=20%n(M \cap S) = 20\%

Percentage of people who ride motorcycles only:

n(M only)=n(M)−n(M∩S)=65%−20%=45%n(M \text{ only}) = n(M) - n(M \cap S) = 65\% - 20\% = 45\%

Percentage of people who ride scooters only:

n(S only)=n(S)−n(M∩S)=35%−20%=15%n(S \text{ only}) = n(S) - n(M \cap S) = 35\% - 20\% = 15\%

Percentage of people who ride at least one (motorcycle or scooter):

n(M∪S)=n(M only)+n(S only)+n(M∩S)=45%+15%+20%=80%n(M \cup S) = n(M \text{ only}) + n(S \text{ only}) + n(M \cap S) = 45\% + 15\% + 20\% = 80\%

Percentage of people who ride neither:

n(Neither)=100%−n(M∪S)=100%−80%=20%n(\text{Neither}) = 100\% - n(M \cup S) = 100\% - 80\% = 20\%

Step 2: Show the information in a Venn diagram.

i)

+-------------------------------------------------+
| Universal Set (100%)                            |
|                                                 |
|        +---------------------+                  |
|        |         M           |                  |
|        |    +---------+      |                  |
|        |    |         |      |                  |
|        |    |   45%   |      |                  |
|        |    |         |      |                  |
|        |    +---------+      |                  |
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