Answer:

Step-by-step explanation:
Given
Total = 900
Singing = 600
Dancing = 500
None = 125
Required
Determine the number of students that participate in both
Representing; Singing with S, Dancing with D, Both singing and dancing with B and None with N;
In Set Notation;

Substitute 900 for Total, 600 for S, 500 for D and 125 for N

Open Brackets

Collect Like Terms



Collect Like Terms


Multiply both sides by -1


Reorder

<em>Hence, the number of students that do not participate in both is 325</em>
Answer:
160 (not sure)
Step-by-step explanation:
400 / 2.5 = 160
160x1 = 160
Answer:
48
Step-by-step explanation:
Answer:
i will only answer 11 and 4
Step-by-step explanation:
4: 23 i know its not the whole thing
11:45 its not the full thing