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Mathematics, 31.07.2019 07:40 laqu33n021
Ihave a maths question and have no idea where to start: "john has an empty box. he puts some red counters and some blue counters into the box. the ratio of the number of red counters to blue counters is 1: 4 linda takes at random 2 counters from the box. the probability that she takes 2 red counters is 6/155 how many red counters did john put in the box? " i know that the probability of picking red the first time is 1/5, and therefore p(picking red the second time)=6/31(=(6/155)/(1/ and p(picking blue the first time is 4/5. but from here i don't know where to go or what to do.
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Ihave a maths question and have no idea where to start: "john has an empty box. he puts some red co...
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