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Each pack of 1kg contains one of the letters B, A, M and O. In every 20 packs, there are four Bs, five As, ten Ms and one O. What is the probability that a pack will have a B

Ritesh Phogat

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4/20 that is 1/5 give 20%

Can you explain this ?

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Total Packs = 20

Contain B = 4

Therefore

probability = B/Total = 4/20 = 1/5