no of red balls 5 and some blue. if the probability of getting a blue ball is 5 times that of a red ball what is the number of blue balls
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Let number of blue balls be x.
Red balls are 5.
Total balls = 5 + x
P(E) = (Number of favourable outcomes/ Total number of outcomes)
∴ P (drawing a blue ball) = [x/(x+5)] ——–(i)
Similarly,
P (drawing a red ball) = [5/(x+5)] ——–(i)
From equation (i) and (ii)
x = 10
Hence, the total number of blue balls = 10
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Here you go,
Let number of blue balls be x.
Red balls are 5.
Total balls = 5 + x
P(E) = (Number of favourable outcomes/ Total number of outcomes)
∴ P (drawing a blue ball) = [x/(x+5)] ——–(i)
Similarly,
P (drawing a red ball) = [5/(x+5)] ——–(i)
From equation (i) and (ii)
x = 10
Hence, the total number of blue balls = 10
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