How old was Elizabeth Gaskell in 1875

If she were alive, she would be 75 years old.

Explanation:

Elizabeth Gaskell was born in 1810 and died in 1865. She was a novelist, born in England, and wrote biographies and short stories. She devoted the greatest opus of her work to writing about English society of the Victorian era. Her texts describe all strata of English society. In addition to its literary value, its hells also serve historians as sources for English analysis in the Victorian era.