Rolong kak

<p>(1) Rata-rata kumpulan data tersebut 6 bila a = 9</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3, 5, 7, a = 3, 5, 7, 9</p><p>Rata-rata = Jumlah angka dalam data ÷ jumlah data</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= (3 + 5 + 7 + 9) ÷ 4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 24 ÷ 4</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 6 (Benar)</p><p>(2) Median kumpulan data tersebut 5 bila a = 7</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3, 5, 7, a = 3, 5, 7, 7</p><p>Median = Nilai tengah ÷ 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = (5 + 7) ÷ 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 12 ÷ 2</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 6 (Salah)</p><p>(3) Jangkauan kumpulan data tersebut adalah 4 bila a = 6</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 3, 5, 7, a = 3, 5, 7, 6 (susun dari terkecil)</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 3, 5, 6, 7</p><p>Jangkauan = Data terbesar - Data terkecil</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 7 - 3</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 4</p><p>Nah sudah dipastikan bahwa yang benar adalah &nbsp; &nbsp;1 dan 3 (B) tidak perlu mencari pernyataan ke 4 karena tidak ada pilihan 1, 3, 4</p>