A bag contains 3black, 3 white and 1 red balls. Three balls are drawn one after the other without replacement. The probability that the third ball is red is
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Probability= number of favourable outcomes÷total number of outcomes
(It is important to write the equation while solving this kind of questions in exam)
No of favourable outcomes=1
Total number of outcomes=3+3+1=7
Probability=1/7
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Step-by-step explanation:
total balls in bags = 3+3+1 = 7
number of red balls = 1
totsl number of balls = 7
probability of getting a red ball = no. of red balls / total number of balls = 1/7
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