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In a group of students, each one knows either Hindi or English. If 100 know Hindi, 50 know English and 30 know both, how many students are there in group?
  • a)
    100
  • b)
    120
  • c)
    150
  • d)
    180
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
In a group of students, each one knows either Hindi or English. If 100...
The logic followed is:
Therefore, the number of students in the group are 20 + 30 + 70 = 120
The number of students = 120
Hence, the correct answer is "120".
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Most Upvoted Answer
In a group of students, each one knows either Hindi or English. If 100...
Analysis:
Given data:
- Number of students who know Hindi = 100
- Number of students who know English = 50
- Number of students who know both Hindi and English = 30

Calculating total number of students:
Let's assume the total number of students in the group is x.
- Number of students who know Hindi = 100
- Number of students who know English = 50
- Number of students who know both Hindi and English = 30

Using the principle of sets:
Total number of students = Number of students who know Hindi + Number of students who know English - Number of students who know both Hindi and English
x = 100 + 50 - 30
x = 120
Therefore, there are 120 students in the group.
Therefore, the correct answer is option B) 120.
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In a group of students, each one knows either Hindi or English. If 100 know Hindi, 50 know English and 30 know both, how many students are there in group?a)100b)120c)150d)180Correct answer is option 'B'. Can you explain this answer?
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