Question

(ii) P(10, r + 1) : P (11, r) = 30 : 11.​

Answer 1

Answer:

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Step-by-step explanation:

P(10,r+1):P(11:r)=30:11. P(10 ,r+1)/P(11,r)=30/11. 10!/10!-(r+1)/11!/11!-r!=30/ 11. 10!/(10-r-1)!/11!/(11-r)!=30/11.

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Answer 2

Step-by-step explanation:

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