Every ninth person in line at a movie theater gets free popcorn. Every sixth person gets free apple juice. Shani says that the thirty-sixth customer will be the first customer to get both free popcorn and apple juice. Is she right? If not, describe her mistake

Respuesta :

No, Shani is not right.
The 1st customer to get popcorn and apple juice is the 18th customer.
She missed that 18 is a common multiple of 6 & 9
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