Mathematics, 12.12.2019 07:31 deboahsouthall

Packs of pens come in sets of 10. packs of felt pens contain 6 coloured and 4 black if a school buy enough packs so there are 90 black felt pens, how many coloured pens will be bought ?

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Packs of pens come in sets of 10. packs of felt pens contain 6 coloured and 4 black if a school buy...

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