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JEE Advanced Mathematics question

MathematicsProbabilityJEE Advanced

From a box containing 20 tickets of value 1 to 20, four tickets are drawn one by one. After each draw, the ticket is replaced. The probability that the largest value of tickets drawn is 15 is

Answer: (D)

Solution

The draws are independent, and each value from 1 to 20 is equally likely on every draw.

"Largest value " means all four values are but not all are :

P(=15)=P(15)-P(14)=(-(Missing argument for \frac\frac{1

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Question ID VK-109773