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3) In a hostel there are 125 students, out of which 80 drink tea, 60 drinkcoffee and 20 drink tea and coffee both. Find the number of studentswho do not drink tea or coffee. |
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Answer» Answer: 5 students. Explanation: Given : In a hostel there are 125 students out of which 80 DRINKS TEA, 60 drinks coffee and 20 drinks tea and coffee both. To Find : Number of students who do not drink tea or coffee. Solution : Total students,a=> 125 Number of student who drink tea,t=> 80 Number of student who drink coffee,c=> 60 Number of student who drink both tea and coffee,tc=> 20 Total number of student who drink both tea and coffee,b :- => t + c - tc => 80 + 60 - 20 => 120 Number of students who do not drink both tea and coffee :- => a - b => 125 - 120 => 5 ∴ 5 students do not drink tea or coffee. |
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