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monroe17
 3 years ago
Find n(A) of the following set
A={101,102,103,104,...,121}
monroe17
 3 years ago
Find n(A) of the following set A={101,102,103,104,...,121}

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jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.0n(A) = number of items in set A So how many elements are in set A?

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.0In other words, how many whole numbers are there from 101 to 121?

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.0good, you got it

jim_thompson5910
 3 years ago
Best ResponseYou've already chosen the best response.0You can either count them out, or you can use the trick Last number  First number + 1 = 121  101 + 1 = 21 Either way gives you a count of 21.
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