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OpenStudy (anonymous):
30 children r going on a trip it costs £5 including lunch Some go with their own lunch so they pay £3 The 30 children pay a total of £110 How many take their own lunch?
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OpenStudy (anonymous):
20 take their own lunch. 20*3=60 5*10=50 60+50=110
OpenStudy (anonymous):
Thx
OpenStudy (anonymous):
trial and error
OpenStudy (anonymous):
20 take ther own
OpenStudy (anonymous):
I had it before but I forgot
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OpenStudy (anonymous):
I didn't use trial and error. I guessed right the first time. It was just luck though.
OpenStudy (anonymous):
lucky it was trial and error when I did it though ;)
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