Question
PSLE
A macaron costs $1.20 in Bakery M. For every 3 macarons a customer buys, he can buy the fourth one at half the price. What is the greatest number of macarons that a customer can buy with $15?
3 m

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PSLE
A macaron costs $1.20 in Bakery M. For every 3 macarons a customer buys, he can buy the fourth one at half the price. What is the greatest number of macarons that a customer can buy with $15?