In a class of 42 students, 21 joined the field trip to Ilocos Norte while 32 joined the field trip to Rizal on a separate date. How many students joined both field trips? Show your solution:)
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In a class of 42 students, 21 joined the field trip to Ilocos Norte while 32 joined the field trip to Rizal on a separate date. How many students joined both field trips? Show your solution:)
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Explanation:
-Minus the total
number of students to the students who joined ilocos norte field trip
42-21 = 21
-Minus the total
number of students to the students who joined rizal field trip
42-32= 10
-now minus the difference of the two equations.
21-10= 11
And to make it sure
Minus the total of students who joined ilocos norte field trip to 11
21-11 = 10
And do the same to the other
32-11= 21
Now lets add!
10+21+11 = 42
The answer is 42 and remember that there are 42 students, therefore the answer in your question is 11.
+21
——
53 students joined the field trip