Tds with joint seller (nri + indian resident)

Hi,

NRI A had purchased a property in Noida 4 years back for 60 Lakhs.
NRI paid 20 Lakhs from his NRE account and rest was paid by his india resident father .

Now properties is bing sold for 60 Lakhs. So how the buyer will deduct the TDS as it is being sold by combination of NRI and residnet. WIll it be 1% or 20% TDS or combination of what % they paid for  uyinhg??

Deepak