I want to know the answer to the following question:
How old was Tikhonov when he stopped being Chairman?
All the background I'm provided with is that "On September 27, Nikolai Ryzhkov replaced 79-year-old Nikolai Tikhonov as Chairman of the Council of Ministers, effectively the Soviet prime minister, and on October 14, Nikolai Talyzin replaced Nikolai Baibakov as chairman of the State Planning Committee (GOSPLAN).". Is that enough to answer the question?
Answer: yes