Question

10-20 20-30 30-40 40-50
Frequency 5
18
15
P6​

Answer 1

Answer:

class mark = upper limit + lower limit / 2

Step-by-step explanation:

10 + 20 /2

➡️ 30 / 2 = 15

20 + 30 /2

50 /2 = 25

30 + 40 /2

70 / 2 = 35

40 + 50 / 2

90 /2 = 45

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