Pauline o etela musiamo o o gaufi le ene ga raro gararo ka ngwaga. Tuelo ya loeto lo le longwe ke $2. Morago ga dingwaga di le 5, tuelo ya loeto lo le longwe e oketsegile ka 150%, mme Pauline a swetsa ka gore a se ka a tlogela loeto lope mme a tswelela go ya kwa musiamong dingwaga di le 3 gape. Pauline o dirisitse bokae mo maetong otlhe a musiamo? 

Tim enters a competition and has to try and guess the number of red jelly beans in a jar.  The jar has a square base and is 6 inches by 6 inches and 15 inches tall.  He knows that a jelly bean is .15 cubic inches.  He also knows that they get about 80% efficiency in packing.  He estimates 30% of the jelly beans are red.  The true number of red jelly beans in the container is 900.  How far off was his guess?
Pauline o etetse musiamo ga raro gararo ka ngwaga, ka jalo o ne a duela 3 * 2 = $<<3*2=6>>6 ngwaga le ngwaga mo maetong.
Seo se raya gore mo dingwageng tsa ntlha di le 5 Pauline o dirisitse 5 * 6 = $<<5*6=30>>30 mo diteketeng.
Morago ga dingwaga di le 5 tuelo ya loeto lo le longwe e oketsegile ka 150/100 * 2 = $<<150/100*2=3>>3.
Seo se raya gore tlhwatlhwa e ntšha ya tekete e ne e le 2 + 3 = $<<2+3=5>>5.
Ka jalo ka ngwaga Pauline o ne a duela 3 * 5 = $<<3*5=15>>15.
Mo dingwageng tse 3 tse di fetileng, o duetse gotlhe 3 * 15 = $<<3*15=45>>45. 
Ka kakaretso Pauline o dirisitse 30 + 45 = $<<30+45=75>>75 mo maetong kwa musiamong.
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The volume of the container is 6*6*15=<<6*6*15=540>>540 cubic inches
That means it can fit 540/.15=<<540/.15=3600>>3600 jelly beans
With 80% packing efficiency, you can fit 3600*.8=<<3600*.8=2880>>2880 jelly beans in there
So that means he guesses 2880*.3=<<2880*.3=864>>864 are red
So his guess is off by 900-864=<<900-864=36>>36
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