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- Please,please help me In a statistical investigation of 1003 families of Chandigarh it was found that 63families has neither a phone nor a TV, 794 families has none and 187 has a TV. the number of families in that group having both a phone and a TV
In a statistical investigation of 1003 families of Chandigarh it was found that 63 families has neither a phone nor a TV, 794 families has none and 187 has a TV. the number of families in that group having both a phone and a TV
- Option 1)
36
- Option 2)
41
- Option 3)
32
- Option 4)
None of these.
Answers (1)
As we learnt in
Number of Elements in Union A & B -
n (A ∪ B) = n (A) + n (B) – n (A ∩ B)
- wherein
Given A and B be any finite sets. then Number of Elements in union A & B is given by this formula.
n(phone) =794 n(TV)=187
Families having eaither phone or TV
=1003 - 63=940
Option 1)
36
Incorrect
Option 2)
41
Correct
Option 3)
32
Incorrect
Option 4)
None of these.
Incorrect
View full answer
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