in the class of 40 students 30 speak hindi and 20 speak english. what is the lowest possible number of students who speak both the languages?
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This question tests the concept of LCM.
We will need to get the LCM of the three numbers.
That is:
LCM of 40, 30,20
The LCM of these three is 120.
120 can divide 40,30 and 20.
The least number of students who speak all the languages is 120
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