Engan sisihan piawai. dan dibahagikan
Latihan 4A
1 Min bagi dua set data, A dan B, dengan bilangan data yang sama ialah 50. Sisihan piawai set data A ialah
5 manakala sisihan piawai set data B ialah 10. Set data A dan B bertaburan normal.(Pada gambar rajah
yang sama lakarkan graf taburan normal A dan B dan label lengkung A dan B.
sama) saya nak gambar rajah​

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

happy to

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explanation:

remove parenthesis:

=

apply rule

=

multiply fractions:

=

=

divide:

=

mordancy.