Math, asked by rajenderkumar3687, 1 day ago

(2) 6 (3) 4 (4) 5 निर्देशः प्रश्न (30 - 32) : निम्नलिखित जानकारी को ध्यानपूर्वक अध्ययन कर प्रश्नों के उत्तर दीजिए। विद्यार्थियों के एक समूह में 21 विद्यार्थी फुटबॉल पसंद करते हैं। 26 विद्यार्थी क्रिकेट पसंद करते हैं, 29 विद्यार्थी वॉलीबॉल पसंद करते हैं। 15 विद्यार्थी क्रिकेट तथा वॉलीबॉल पसंद करते हैं, 14 विद्यार्थी क्रिकेट तथा फुटबॉल पसंद करते हैं, 12 विद्यार्थी वॉलीबॉल तथा फुटबॉल पसंद करते हैं और 8 विद्यार्थी सभी तीनों खेल पसंद करते हैं। B. How man sequence immediate 4.72721 कामह में कल कितने विद्यार्थी हैं? (1) 1​

Answers

Answered by rd361539
0

(21+26+29)-15+14+12+8

=76-49

27

Answered by knjroopa
1

Step-by-step explanation:

In a group of students, 21 like football. 26 students like cricket, 29 students like volleyball. 15 students like cricket and volleyball, 14 students like cricket and football, 12 students like volleyball and football and 8 students like all three sports.  

how many students are there in the group.

  • Let X, Y, Z be the set of students who like football, Cricket, and volleyball respectively. Then
  •               n(X) = 21
  •               n(Y) = 26
  •               n(Z) = 29
  • n(X Ռ Y) = 14
  • n(X Ռ Z) = 12
  • n (Y Ռ Z) = 15
  • n(X Ռ Y Ռ Z) = 8
  • So we have  
  •     n(X Ս Y Ս Z) = [n(X) + n(Y) + n(Z) + n(X Ռ Y Ռ Z)] – [n(X Ռ Y) + n(X Ռ Z) + n(Y Ռ Z)]
  •                            = (21 + 26 + 29 + 8 ) – (14 + 12 + 15)
  •                             = 84 – 41
  •                               = 43
  • So there are 43 students in the group.
  • Number of students who like volleyball only will be 10
  • Number of students who like only cricket will be 5
  • Number of students who like only football will be 3
  • Number of students who like both football and volleyball but not cricket will be 4

Reference link will be

https://brainly.in/question/32450211

Similar questions