There are 25 pens in a packet. 7 of the pens are green. 10 of the pens are black. The rest of the pens are red. Work out the total number of packets of pens sold last Friday. (2)

Mathematics

IGCSE&ALevel

EDEXCEL

Exam No：4MA1_2F_que_20200305 Year：2020 Question No：9(c)

Answer:

6: Statistics and probability

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