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there are some red counters in a bag. The ratio of red counters to blue counters are 3:12 Two counters are removed at random. The probability that both the count is taking a blue is 1/20. How many counters are in the bag before any counters were removed?

There Are Some Red Counters In A Bag The Ratio Of Red Counters To Blue Counters Are 312 Two Counters Are Removed At Random The Probability That Both The Count I class=

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