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A bag has 3 white, 5 red, 7 blue balls. P(white or red) when one is drawn is
A7/15
B3/15
C8/15
D5/15
Answer & Solution
Correct answer: C. 8/15
1. Total = 3 + 5 + 7 = 15.
2. Favourable (white or red) = 3 + 5 = 8.
3. P(white or red) = 8/15.
4. So probability is 8/15.
_Source: ICAI BoS Foundation Paper 3, Ch 15 'Probability', p.9_
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