In a town of 20,000 residents, each resident reads either "Town's new i' or
"Announcer", or both newspapers. Out of the 20,000 residents, 12,420 ead
"Town's news" and 11,540 read "Announcer". How many residents read both the
newspapers?
Answers
Given : town of 20,000 residents
each resident reads either "Town's news' or "Announcer", or both newspapers.
12,420 read "Town's news" and 11,540 read "Announcer"
To Find : How many residents read both the newspapers
Solution:
Read Town News T = 12420
Read Announcer A = 11540
Read Both T ∩ A = ?
Read None = 0 (As each resident reads either one or both )
Total = 20000
Total = T + A - T ∩ A + None
=> 20000 = 12420 + 11540 - T ∩ A + 0
=> T ∩ A = 3960
3960 residents read both the newspapers
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Answer:
3960
Explanation:
12420+11540-20000
2420+1540=3960