Probability Part 1

Section: Mathematics
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Question : 36 of 100
 
Marks: +1, -0
In a box, there are 20 cards, out of which 10 are lebelled as A and the remaining 10 are labelled as B. Cards are drawn at random, one after the other and with replacement, till a second A-card is obtained. The probability that the second A-card appears before the third B-card is :
[9 Jan 2020 Shift 1]
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