“Just do it.”這句話中,字母“t”出現(xiàn)的頻率是


  1. A.
    4
  2. B.
    數(shù)學公式
  3. C.
    數(shù)學公式
  4. D.
    數(shù)學公式
D
分析:首先正確數(shù)出這句話中的字母總數(shù),t出現(xiàn)的次數(shù),再根據(jù)頻率=頻數(shù)÷總數(shù)進行計算.
解答:這句話中,8個字母t出現(xiàn)了2次,
則字母“t”出現(xiàn)的頻率是
故選D.
點評:本題考查了頻數(shù)和頻率的知識,屬于基礎題,解答本題的關鍵是掌握頻率的概念以及計算方法:頻率=頻數(shù)÷總數(shù).
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