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The picture shows how many chairs the carpenters make in one day. All carpenters work at the same speed. How many chairs will 7 carpenters make in one day?

Class 6Unitary MethodRatio and Proportion
  • A15
  • B28
  • C21
  • D84

Step-by-Step Solution

4 carpenters make 12 chairs, so 1 carpenter makes chairs. 7 carpenters make chairs. (15 adds 3 carpenters to 12 chairs.)
Answer: C) 21

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