Peter F. answered 10/04/20
Published Author; Kinder-College English Tutor w/ 18 Years' Experience
Hello Hashaam,
The mistake in this statement is grammatical.
Since the statement reads: "It is to be noted that his ways are (plural form) like that (singular) of his uncle", we have a conflicting mixture of grammar tenses (plural and singular) in one sentence.
The statement should either read: "It is to be noted that his ways are like those of his uncle" or "It is to be noted that his way is like that of his uncle."
"That" (as written in the original statement above) implies the singular tense of the English written and spoken language.
"Those" implies the plural form of the English written and spoken language. Since "ways" in the original statement above is plural, "those" is therefore the correct (plural) form of grammar necessary for inclusion in the proper written form of the given statement in full.
I hope this helps!