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Answer:
36 people of them did not have a beach umbrella.
Step-by-step explanation:
Proportion states that the two ratios or fractions are equal.
Let x represents the number of people did not have a beach umbrella.
As per the statement:
Bella saw that 7 : 11 people brought an umbrella to the beach.
Out of 11 people, only 7 people brought an Umbrella to the beach.
Remaining people did not brought an Umbrella to the beach = 11 -7 = 4 people
It is also given that there were 99 people there.
then by definition of proportion:
By cross multiply we have;
Divide both sides by 11 we get;
Simplify:
x = 36 people.
Therefore, 36 people of them did not have a beach umbrella.