bantuin dong nomor 21-23 please

Banyak siswa 50 orang
42 kg = 11
44 kg = 9
46 kg = 10
50 kg = 4
40 kg = x
48 kg = y

[tex]
50 = 11 + 9 + 10 + 4 + x + y\\
50 = 34 + x + y\\
x + y = 50 - 34 = 16\\
x : y = 5 : 3\\
x = \frac {5}{8} \times 16 = 10\\
y = \frac {3}{8} \times 16 = 6\\
[/tex]

40 kg = 10
48 kg = 6

a. Modus = Frekuensi terbesar = 42
Jawaban B

b. Median = 1/2 (data ke-25 + data ke 25)
Median = 1/2 (44 + 44) = 1/2 x 88 = 44
Jawaban C

[tex]
c. Mean = \frac {(40 \times 10)+(42 \times 11)+(44 \times 9)+(46 \times 10)+(48 \times 6)+(50\times 4)}{50}\\
Mean = \frac {400+462+396+460+288+200}{50}\\
Mean =\frac {2206}{50} = 44,12
[/tex]
Jawaban C