The number of people left out of 50 will be 20.
Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.
Given that 50 people went to a play [tex]\dfrac{3}{5}[/tex] of the people stayed to the end.
The number of people stays is calculated as:-
[tex]\rm\ N = 50 \times \dfrac{3}{5}[/tex]
N = 10 x 3
N = 30
The number of people left is calculated as:-
⇒ 50 - 30
⇒20
Therefore, the number of people left out of 50 will be 20.
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