“May  you  have  a  good  summer  holiday．”（祝你有個(gè)快樂(lè)的暑假），在這段句子的所有英文字母中，字母a出現(xiàn)的頻率是
1
7
1
7
．
分析：找出所有字母的個(gè)數(shù)以及字母a的個(gè)數(shù)，然后根據(jù)頻率=
頻數(shù)
數(shù)據(jù)總和
進(jìn)行計(jì)算即可得解．
解答：解：“May  you  have  a  good  summer  holiday”中共有28個(gè)字母，
字母a出現(xiàn)了4次，
所以，字母a出現(xiàn)的頻率=
4
28
=
1
7
．
故答案為：
1
7
．
點(diǎn)評(píng)：本題考查了頻率、頻數(shù)，主要利用了頻率=
頻數(shù)
數(shù)據(jù)總和
．
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