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There are 11 pens in a bag, 4 Green and 7 Blue. What is the probability of picking the same coloured pens?

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Ayo is 7 years older than Hugo. Mel is twice as old as Ayo. The sum of their three ages is 77 Find the ratio of Hugo's age to Ayo's age to Mel's age.

solve to 2 decimal places; (2x+3/(x-4)) - 2x-8/(2x+1) = 1

There are n sweets in a bag, 6 of which are red. The rest of the sweets are blue. Jen removes 1 sweet from the bag. Jen then takes another sweet from the bag. The probability that Hannah takes two red sweets is 1/3. Show that n²-n-90=0.

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