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dear sir , There are unlimited number of coupons each bearing one of the letters of A,B,C .In how many ways "m" coupons can be selected such that the word BAC cannot be spelt. [answer is 3*(2^m - 1) ]

dear sir ,


There are unlimited number of coupons each bearing one of the letters of A,B,C .In how many ways  "m" coupons can be selected such that the word BAC cannot be spelt. [answer is 3*(2^m - 1) ]

Grade:12

1 Answers

h v
33 Points
10 years ago

can anyone give the answer please?

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