Question

A bag contains n black and white balls pairs of balls are drawn without replacement until the bag is empty

Answer 1

Answer:

5

Step-by-step explanation:

According to the given condition:

(nC1 nC1)(n−1C1 n−1C1)..........(1C1 1C1)=14400

⇒(nCn−1C1....... 1C1)2=(120)2

⇒n(n−1)(n−2).... 1=120

⇒n!=5!

⇒n=5

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