Math, asked by Nuethera, 10 months ago

$10_C_{r+2}:10_C_{r} = 10/21$

find the value of r.

Answers

Answered by Anonymous

10Cr=20Cr+1

=>20Cr-10Cr+1=0

=>10Cr+1=0

=>r= -1/10C

Nuethera: I will send u an invite

Anonymous: Actually I used my mother's so I can't give

Nuethera: oh so why don't you make one your mom won't mind either it Gmail id

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Anonymous: Excuse me!!! My 9 completed dear

Anonymous: I am in 10 th now not 8 th

Nuethera: i meant everyone should have their own email by 8th grade

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how?

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