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Question

A bag contains red white and blue marbles The
probability of selecting a red marble is 215 and that
of selecting a blue marble is 415 The probability
of selecting a white marble is

A
1315
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B
1115
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C
35
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D
25
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Solution

The correct option is C 35
P(white marble) = Total probability - [P(red marble) + P(blue marble)]
= 1-[215+415]=1615=915=35

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