３と４と５の平均は４です。
Sentence Analyzer
English Translation
The average of 3, 4 and 5 is 4.
Furigana
３と４と５の平均 は４です。
Romanji
San to yon to go no heikin wa yon desu.
Words
三
(さん、み)
three; tri-
と
(と)
if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)
四
(し、よん、よ)
four
五
(ご、いつ、い)
five
の
(の)
indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
平均
(へいきん、へいぎん)
average; mean; balance; equilibrium
は
(は)
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
です
(です)
be; is