Mathematics, 01.09.2019 04:30 gabbihardy7980

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 the number to the number of 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 into the box?

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John has an empty box. he puts some red counters and some blue counters into the box. the ratio of t...