Mathematics, 27.02.2021 18:00, hopecastillo83098

Mary has 20 biscuits in a tin. There are: 11 plain biscuits. 7 chocolate biscuits. 2 currant biscuits. Sue takes at random two biscuits from the tin. Work out the probability that the two biscuits were not the same type. HELP ASAP!!

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Mary has 20 biscuits in a tin. There are: 11 plain biscuits. 7 chocolate biscuits. 2 currant biscuit...