panjang kelas a - b adalah (nilai b kurang nilai a + 1)
a.
= (4-1 +1)
= 4
b.
=(9-5+1)
= 4+1
= 5
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panjang kelas a - b adalah (nilai b kurang nilai a + 1)
a.
= (4-1 +1)
= 4
b.
=(9-5+1)
= 4+1
= 5