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There are 5 historical monuments, 6 gard...

There are 5 historical monuments, 6 gardens, and 7 shopping malls in a city. In how many ways a tourist can visit the city if he visits at least one shopping mall.

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CENGAGE ENGLISH-PERMUTATIONS AND COMBINATIONS-All Questions
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  2. Let ngeq2 be integer. Take n distinct points on a circle and join each...

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