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# One ball is selected from a bag containing x red balls, y blue balls and z yellow balls. What is the probability of selecting a blue ball?

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I need a detailed explanation please

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- PhilipLv 64 weeks ago
Adopt a more sensible notation.

All the balls are together in a bag.Put (#red balls,#blue balls,#yellow balls) = (r,b,y).Put the sum of all the balls = s = (r+b+y).1 ball is drawn. Probability it's blue can be expressed as a percent by first dividing the number of blue balls by the total number of balls = (r/s). Thenmultiply the fraction by 100 and stick a % sign after the result. Remember always that % is a short way of saying 'divided by 100'. You're expressing fraction (r/s) as a fraction of 100.

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- az_lenderLv 74 weeks ago
P = y/(x + y + z)

- Pinkie4 weeks agoReport
Could you explain please?

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